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URL: https://datatracker.ietf.org/doc/html/rfc6118

⇱ RFC 6118 - Update of Legacy IANA Registrations of Enumservices



Internet Engineering Task Force (IETF) B. Hoeneisen
Request for Comments: 6118 Ucom.ch
Updates: 3762, 3764, 3953, 4143, 4002, A. Mayrhofer
 4238, 4355, 4415, 4769, 4969, enum.at
 4979, 5028, 5278, 5333 March 2011
Category: Standards Track
ISSN: 2070-1721


 Update of Legacy IANA Registrations of Enumservices

Abstract

 This document revises all Enumservices that were IANA registered
 under the now obsolete specification of the Enumservice registry
 defined in RFC 3761.

Status of This Memo

 This is an Internet Standards Track document.

 This document is a product of the Internet Engineering Task Force
 (IETF). It represents the consensus of the IETF community. It has
 received public review and has been approved for publication by the
 Internet Engineering Steering Group (IESG). Further information on
 Internet Standards is available in Section 2 of RFC 5741.

 Information about the current status of this document, any errata,
 and how to provide feedback on it may be obtained at
 http://www.rfc-editor.org/info/rfc6118.

Copyright Notice

 Copyright (c) 2011 IETF Trust and the persons identified as the
 document authors. All rights reserved.

 This document is subject to BCP 78 and the IETF Trust's Legal
 Provisions Relating to IETF Documents
 (http://trustee.ietf.org/license-info) in effect on the date of
 publication of this document. Please review these documents
 carefully, as they describe your rights and restrictions with respect
 to this document. Code Components extracted from this document must
 include Simplified BSD License text as described in Section 4.e of
 the Trust Legal Provisions and are provided without warranty as
 described in the Simplified BSD License.






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 This document may contain material from IETF Documents or IETF
 Contributions published or made publicly available before November
 10, 2008. The person(s) controlling the copyright in some of this
 material may not have granted the IETF Trust the right to allow
 modifications of such material outside the IETF Standards Process.
 Without obtaining an adequate license from the person(s) controlling
 the copyright in such materials, this document may not be modified
 outside the IETF Standards Process, and derivative works of it may
 not be created outside the IETF Standards Process, except to format
 it for publication as an RFC or to translate it into languages other
 than English.

Table of Contents

 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 4
 2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 4
 3. IESG Action . . . . . . . . . . . . . . . . . . . . . . . . . 5
 4. Legacy Enumservice Registrations Converted to XML Chunks . . . 5
 4.1. email:mailto . . . . . . . . . . . . . . . . . . . . . . . 6
 4.2. ems:mailto . . . . . . . . . . . . . . . . . . . . . . . . 7
 4.3. ems:tel . . . . . . . . . . . . . . . . . . . . . . . . . 8
 4.4. fax:tel . . . . . . . . . . . . . . . . . . . . . . . . . 9
 4.5. ft:ftp . . . . . . . . . . . . . . . . . . . . . . . . . . 10
 4.6. h323 . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
 4.7. ical-access:http . . . . . . . . . . . . . . . . . . . . . 12
 4.8. ical-access:https . . . . . . . . . . . . . . . . . . . . 13
 4.9. ical-sched:mailto . . . . . . . . . . . . . . . . . . . . 14
 4.10. ifax:mailto . . . . . . . . . . . . . . . . . . . . . . . 15
 4.11. im . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
 4.12. mms:mailto . . . . . . . . . . . . . . . . . . . . . . . . 17
 4.13. mms:tel . . . . . . . . . . . . . . . . . . . . . . . . . 19
 4.14. pres . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
 4.15. pstn:sip . . . . . . . . . . . . . . . . . . . . . . . . . 21
 4.16. pstn:tel . . . . . . . . . . . . . . . . . . . . . . . . . 22
 4.17. sip . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
 4.18. sms:mailto . . . . . . . . . . . . . . . . . . . . . . . . 24
 4.19. sms:tel . . . . . . . . . . . . . . . . . . . . . . . . . 25
 4.20. unifmsg:http . . . . . . . . . . . . . . . . . . . . . . . 26
 4.21. unifmsg:https . . . . . . . . . . . . . . . . . . . . . . 27
 4.22. unifmsg:sip . . . . . . . . . . . . . . . . . . . . . . . 28
 4.23. unifmsg:sips . . . . . . . . . . . . . . . . . . . . . . . 29
 4.24. vcard . . . . . . . . . . . . . . . . . . . . . . . . . . 30
 4.25. videomsg:http . . . . . . . . . . . . . . . . . . . . . . 31
 4.26. videomsg:https . . . . . . . . . . . . . . . . . . . . . . 32
 4.27. videomsg:sip . . . . . . . . . . . . . . . . . . . . . . . 33
 4.28. videomsg:sips . . . . . . . . . . . . . . . . . . . . . . 34
 4.29. voice:tel . . . . . . . . . . . . . . . . . . . . . . . . 35
 4.30. voicemsg:http . . . . . . . . . . . . . . . . . . . . . . 37



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 4.31. voicemsg:https . . . . . . . . . . . . . . . . . . . . . . 38
 4.32. voicemsg:sip . . . . . . . . . . . . . . . . . . . . . . . 39
 4.33. voicemsg:sips . . . . . . . . . . . . . . . . . . . . . . 40
 4.34. voicemsg:tel . . . . . . . . . . . . . . . . . . . . . . . 41
 4.35. vpim:ldap . . . . . . . . . . . . . . . . . . . . . . . . 42
 4.36. vpim:mailto . . . . . . . . . . . . . . . . . . . . . . . 43
 4.37. web:http . . . . . . . . . . . . . . . . . . . . . . . . . 45
 4.38. web:https . . . . . . . . . . . . . . . . . . . . . . . . 46
 4.39. xmpp . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
 5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 47
 6. Security Considerations . . . . . . . . . . . . . . . . . . . 47
 7. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 47
 8. References . . . . . . . . . . . . . . . . . . . . . . . . . . 48
 8.1. Normative References . . . . . . . . . . . . . . . . . . . 48
 8.2. Informative References . . . . . . . . . . . . . . . . . . 49
 Appendix A. Former Content of the IANA Repository . . . . . . . . 49



































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1. Introduction

 [] has obsoleted the IANA registration section of [RFC3761].
 Since the IANA Enumservice registry contains various Enumservices
 registered under the regime of RFC 3761, those registrations do not
 conform to the new guidelines as specified in [RFC6117]. To ensure
 consistency among all Enumservice registrations at IANA, this
 document adds the (nowadays) missing elements to those legacy
 registrations. Furthermore, all legacy Enumservice registrations are
 converted to the new XML-chunk format, and, where deemed necessary,
 minor editorial corrections are applied.

 However, this document only adds the missing elements to the XML
 chunks as specified in the IANA Considerations section of [RFC6117],
 but it does not complete the (nowadays) missing sections of the
 corresponding Enumservice Specifications. In order to conform with
 the new registration regime as specified in [RFC6117], those
 Enumservice Specifications still have to be revised.

 It is important to note that this document does not update the
 functional specification of the concerned Enumservices.

 The following RFCs are updated by this document:

 o [RFC3762]
 o [RFC3764]
 o [RFC3953]
 o [RFC4143]
 o [RFC4002]
 o [RFC4238]
 o [RFC4355]
 o [RFC4415]
 o [RFC4769]
 o [RFC4969]
 o [RFC4979]
 o [RFC5028]
 o [RFC5278]
 o [RFC5333]

2. Terminology

 The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
 "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
 document are to be interpreted as described in RFC 2119 [RFC2119].







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3. IESG Action

 According to [RFC3761], any Enumservice registration had to be
 published as a Standards Track, Experimental, or BCP (Best Current
 Practice) RFC. [RFC6117] no longer has this requirement, i.e.,
 "Specification Required", which implies the use of a Designated
 Expert [RFC5226], is sufficient.

 This document changes the approval requirement for updates to
 Enumservice registrations to Specification Required, whereby the
 specification and request are reviewed by a Designated Expert as
 described in [RFC6117].

4. Legacy Enumservice Registrations Converted to XML Chunks

 In the following, the legacy Enumservice Registrations are converted
 to XML chunks that include the new elements introduced by [RFC6117].

 (Note that references in Sections 4.1 - 4.39 refer to the references
 section within the respective Enumservice Specification.)

4.1. email:mailto

 <record>
 <!-- email:mailto -->
 <class>Application-Based, Common</class>
 <type>email</type>
 <subtype>mailto</subtype>
 <urischeme>mailto</urischeme>
 <functionalspec>
 <paragraph>
 This Enumservice indicates that the resource can be
 addressed by the associated URI in order to send an
 email.
 </paragraph>
 </functionalspec>
 <security>
 See <xref type="rfc" data="rfc4355"/>, Section 6.
 </security>
 <usage>COMMON</usage>
 <registrationdocs>
 <xref type="rfc" data="rfc4355"/> (updated by RFC 6118)
 <xref type="rfc" data="RFC 6118"/>
 </registrationdocs>
 <requesters>
 <xref type="person" data="Rudolf_Brandner"/>
 <xref type="person" data="Lawrence_Conroy"/>
 <xref type="person" data="Richard_Stastny"/>



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 </requesters>
 </record>

4.2. ems:mailto

 <record>
 <!-- ems:mailto -->
 <class>Application-Based, Common</class>
 <type>ems</type>
 <subtype>mailto</subtype>
 <urischeme>mailto</urischeme>
 <functionalspec>
 <paragraph>
 This Enumservice indicates that the resource
 identified by the associated URI is capable
 of receiving a message using an email protocol.
 </paragraph>
 <paragraph>
 EMS content is sent over SMTP using the format
 specified by TS 23.140 [15] Section 8.4.4 and TS
 26.140 [16] Section 4, as an MMS message. Within
 such a message, EMS content is carried as either a
 text or application/octet-stream MIME sub-part (see
 TS 26.140 [16], Section 4.1).
 </paragraph>
 <paragraph>
 References are contained in <xref type="rfc" data="rfc4355"/>.
 </paragraph>
 </functionalspec>
 <security>
 <paragraph>
 There are no specific security issues with this
 Enumservice. However, the general considerations of
 Section 6 of <xref type="rfc" data="rfc4355"/> apply.
 </paragraph>
 </security>
 <usage>COMMON</usage>
 <registrationdocs>
 <xref type="rfc" data="rfc4355"/> (updated by RFC 6118)
 <xref type="rfc" data="RFC 6118"/>
 </registrationdocs>
 <requesters>
 <xref type="person" data="Rudolf_Brandner"/>
 <xref type="person" data="Lawrence_Conroy"/>
 <xref type="person" data="Richard_Stastny"/>
 </requesters>
 </record>




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4.3. ems:tel

 <record>
 <!-- ems:tel -->
 <class>Application-Based, Common</class>
 <type>ems</type>
 <subtype>tel</subtype>
 <urischeme>tel</urischeme>
 <functionalspec>
 <paragraph>
 This Enumservice indicates that the resource
 identified by the associated URI is capable
 of receiving a message using the Enhanced Message
 Service (EMS) [14].
 </paragraph>
 <paragraph>
 References are contained in <xref type="rfc" data="rfc4355"/>.
 </paragraph>
 </functionalspec>
 <security>
 <paragraph>
 There are no specific security issues with this
 Enumservice. However, the general considerations of
 Section 6 of <xref type="rfc" data="rfc4355"/> apply.
 </paragraph>
 </security>
 <usage>COMMON</usage>
 <registrationdocs>
 <xref type="rfc" data="rfc4355"/> (updated by RFC 6118)
 <xref type="rfc" data="RFC 6118"/>
 </registrationdocs>
 <requesters>
 <xref type="person" data="Rudolf_Brandner"/>
 <xref type="person" data="Lawrence_Conroy"/>
 <xref type="person" data="Richard_Stastny"/>
 </requesters>
 <additionalinfo>
 <paragraph>
 Note that an indication of EMS can be taken as
 implying that the recipient is capable of receiving
 SMS messages at this address as well.
 </paragraph>
 </additionalinfo>
 </record>







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4.4. fax:tel

 <record>
 <!-- fax:tel -->
 <class>Application-Based, Subset</class>
 <type>fax</type>
 <subtype>tel</subtype>
 <urischeme>tel</urischeme>
 <functionalspec>
 <paragraph>
 This Enumservice indicates that the resource
 identified by the associated URI is capable
 of being contacted to provide a communication
 session during which facsimile documents can be
 sent.
 </paragraph>
 <paragraph>
 A client selecting this NAPTR will have support
 for generating and sending facsimile documents to
 the recipient using the PSTN session and transfer
 protocols specified in [12] and [13] in
 <xref type="rfc" data="rfc4355"/> -
 in short, they will have a fax program with a local
 or shared PSTN access over which they can send
 faxes.
 </paragraph>
 <paragraph>
 References are contained in <xref type="rfc" data="rfc4355"/>.
 </paragraph>
 </functionalspec>
 <security>
 See <xref type="rfc" data="rfc4355"/>, Section 6.
 </security>
 <usage>COMMON</usage>
 <registrationdocs>
 <xref type="rfc" data="rfc4355"/> (updated by RFC 6118)
 <xref type="rfc" data="RFC 6118"/>
 </registrationdocs>
 <requesters>
 <xref type="person" data="Rudolf_Brandner"/>
 <xref type="person" data="Lawrence_Conroy"/>
 <xref type="person" data="Richard_Stastny"/>
 </requesters>
 </record>







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4.5. ft:ftp

 <record>
 <!-- ft:ftp -->
 <class>Application-Based, Subset</class>
 <type>ft</type>
 <subtype>ftp</subtype>
 <urischeme>ftp</urischeme>
 <functionalspec>
 <paragraph>
 This Enumservice indicates that the resource
 identified by the associated URI is a file
 service from which a file or file listing can be
 retrieved.
 </paragraph>
 </functionalspec>
 <security>
 See <xref type="rfc" data="rfc4002"/>, Section 5.
 </security>
 <usage>COMMON</usage>
 <registrationdocs>
 <xref type="rfc" data="rfc4002"/> (updated by RFC 6118)
 <xref type="rfc" data="RFC 6118"/>
 </registrationdocs>
 <requesters>
 <xref type="person" data="Rudolf_Brandner"/>
 <xref type="person" data="Lawrence_Conroy"/>
 <xref type="person" data="Richard_Stastny"/>
 </requesters>
 </record>





















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4.6. h323

 <record>
 <!-- h323 -->
 <class>Protocol-Based</class>
 <type>h323</type>
 <!-- No subtype -->
 <urischeme>h323</urischeme>
 <functionalspec>
 See <xref type="rfc" data="rfc3762"/>, Section 3.
 </functionalspec>
 <security>
 See <xref type="rfc" data="rfc3762"/>, Section 5.
 </security>
 <usage>COMMON</usage>
 <registrationdocs>
 <xref type="rfc" data="rfc3762"/> (updated by RFC 6118)
 <xref type="rfc" data="RFC 6118"/>
 </registrationdocs>
 <requesters>
 <xref type="person" data="Orit_Levin"/>
 </requesters>
 </record>




























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4.7. ical-access:http

 <record>
 <!-- ical-access:http -->
 <class>Application-Based, Common</class>
 <type>ical-access</type>
 <subtype>http</subtype>
 <urischeme>http</urischeme>
 <functionalspec>
 <paragraph>
 This Enumservice indicates that the resource identified
 can be addressed by the associated URI in order to access
 a user's calendar (for example free/busy status) using
 the CalDAV [7] protocol for Internet calendaring.
 </paragraph>
 <paragraph>
 References are contained in <xref type="rfc" data="rfc5333"/>.
 </paragraph>
 </functionalspec>
 <security>
 See <xref type="rfc" data="rfc5333"/>, Section 4.
 </security>
 <usage>COMMON</usage>
 <registrationdocs>
 <xref type="rfc" data="rfc5333"/> (updated by RFC 6118)
 <xref type="rfc" data="RFC 6118"/>
 </registrationdocs>
 <requesters>
 <xref type="person" data="Rohan_Mahy"/>
 </requesters>
 </record>




















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4.8. ical-access:https

 <record>
 <!-- ical-access:https -->
 <class>Application-Based, Common</class>
 <type>ical-access</type>
 <subtype>https</subtype>
 <urischeme>https</urischeme>
 <functionalspec>
 <paragraph>
 This Enumservice indicates that the resource identified
 can be addressed by the associated URI in order to access
 a user's calendar (for example free/busy status) using
 the CalDAV [7] protocol for Internet calendaring.
 </paragraph>
 <paragraph>
 References are contained in <xref type="rfc" data="rfc5333"/>.
 </paragraph>
 </functionalspec>
 <security>
 See <xref type="rfc" data="rfc5333"/>, Section 4.
 </security>
 <usage>COMMON</usage>
 <registrationdocs>
 <xref type="rfc" data="rfc5333"/> (updated by RFC 6118)
 <xref type="rfc" data="RFC 6118"/>
 </registrationdocs>
 <requesters>
 <xref type="person" data="Rohan_Mahy"/>
 </requesters>
 </record>




















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4.9. ical-sched:mailto

 <record>
 <!-- ical-sched:mailto -->
 <class>Application-Based, Common</class>
 <type>ical-sched</type>
 <subtype>mailto</subtype>
 <urischeme>mailto</urischeme>
 <functionalspec>
 <paragraph>
 This Enumservice indicates that the resource identified
 can be addressed by the associated URI used for
 scheduling using Internet calendaring via Internet mail
 with the iMIP [6] protocol.
 </paragraph>
 <paragraph>
 References are contained in <xref type="rfc" data="rfc5333"/>.
 </paragraph>
 </functionalspec>
 <security>
 See <xref type="rfc" data="rfc5333"/>, Section 4.
 </security>
 <usage>COMMON</usage>
 <registrationdocs>
 <xref type="rfc" data="rfc5333"/> (updated by RFC 6118)
 <xref type="rfc" data="RFC 6118"/>
 </registrationdocs>
 <requesters>
 <xref type="person" data="Rohan_Mahy"/>
 </requesters>
 </record>




















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4.10. ifax:mailto

 <record>
 <!-- ifax:mailto -->
 <class>Application-Based, Subset</class>
 <type>ifax</type>
 <subtype>mailto</subtype>
 <urischeme>mailto</urischeme>
 <functionalspec>
 See <xref type="rfc" data="rfc4143"/>, Section 1.
 </functionalspec>
 <security>
 See <xref type="rfc" data="rfc4143"/>, Section 3.
 </security>
 <usage>COMMON</usage>
 <registrationdocs>
 <xref type="rfc" data="rfc4143"/> (updated by RFC 6118)
 <xref type="rfc" data="RFC 6118"/>
 </registrationdocs>
 <requesters>
 <xref type="person" data="Kiyoshi_Toyoda"/>
 <xref type="person" data="Dave_Crocker"/>
 </requesters>
 <additionalinfo>
 <paragraph>
 The URI Scheme is 'mailto' because facsimile is a
 profile of standard Internet mail and uses standard
 Internet mail addressing.
 </paragraph>
 </additionalinfo>
 </record>




















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4.11. im

 <record>
 <!-- im -->
 <class>Application-Based, Common</class>
 <type>im</type>
 <!-- No subtype -->
 <urischeme>im</urischeme>
 <functionalspec>
 <paragraph>
 This Enumservice indicates that the resource
 identified is an 'im:' URI. The 'im:' URI scheme
 does not identify any particular protocol that will
 be used to handle instant messaging receipt or
 delivery, rather the mechanism in RFC 3861 [4] is
 used to discover whether an IM protocol supported by
 the party querying ENUM is also supported by the
 target resource.
 </paragraph>
 <paragraph>
 References are contained in <xref type="rfc" data="rfc5028"/>.
 </paragraph>
 </functionalspec>
 <security>
 See <xref type="rfc" data="rfc5028"/>, Section 3.
 </security>
 <usage>COMMON</usage>
 <registrationdocs>
 <xref type="rfc" data="rfc5028"/> (updated by RFC 6118)
 <xref type="rfc" data="RFC 6118"/>
 </registrationdocs>
 <requesters>
 <xref type="person" data="Rohan_Mahy"/>
 </requesters>
 </record>
















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4.12. mms:mailto

 <record>
 <!-- mms:mailto -->
 <class>Application-Based, Common</class>
 <type>mms</type>
 <subtype>mailto</subtype>
 <urischeme>mailto</urischeme>
 <functionalspec>
 <paragraph>
 This Enumservice indicates that the resource
 identified by the associated URI is capable
 of receiving a message using an email protocol.
 </paragraph>
 <paragraph>
 MMS messages are sent over SMTP using the format
 specified by TS 23.140 [15] Section 8.4.4 and TS
 26.140 [16] Section 4.
 </paragraph>
 <paragraph>
 Within and between MMS Environments (MMSE,
 network infrastructures that support the MultiMedia
 Service), other pieces of state data (for example,
 charging-significant information) are exchanged
 between MMS Relay Servers. Thus, although these
 servers use SMTP as the "bearer" for their
 application exchanges, they map their internal state
 to specialized header fields carried in the SMTP message
 exchanges. The header fields used in such MMSE are
 described in detail in [17].
 </paragraph>
 <paragraph>
 References are contained in <xref type="rfc" data="rfc4355"/>.
 </paragraph>
 </functionalspec>
 <security>
 <paragraph>
 There are no specific security issues with this
 Enumservice. However, the general considerations of
 Section 6 of <xref type="rfc" data="rfc4355"/> apply.
 </paragraph>
 </security>
 <usage>COMMON</usage>
 <registrationdocs>
 <xref type="rfc" data="rfc4355"/> (updated by RFC 6118)
 <xref type="rfc" data="RFC 6118"/>
 </registrationdocs>
 <requesters>



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 <xref type="person" data="Rudolf_Brandner"/>
 <xref type="person" data="Lawrence_Conroy"/>
 <xref type="person" data="Richard_Stastny"/>
 </requesters>
 <additionalinfo>
 <paragraph>
 The MMS Architecture describes an interface
 between the MMSE and "legacy messaging systems"
 (labelled as MM3) that accepts "standard" SMTP
 messages. Thus, although the MMS Relay Server that
 supports this interface appears as a standard SMTP
 server from the perspective of an Internet-based
 mail server, it acts as a gateway and translator,
 adding the internal state data that is used within
 and between the MMS Environments. This mechanism is
 described in [17], which also includes references to
 the specifications agreed by those bodies
 responsible for the design of the MMS.
 </paragraph>
 <paragraph>
 References are contained in <xref type="rfc" data="rfc4355"/>.
 </paragraph>
 </additionalinfo>
 </record>



























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4.13. mms:tel

 <record>
 <!-- mms:tel -->
 <class>Application-Based, Common</class>
 <type>mms</type>
 <subtype>tel</subtype>
 <urischeme>tel</urischeme>
 <functionalspec>
 <paragraph>
 This Enumservice indicates that the resource
 identified by the associated URI is capable
 of receiving a message using the Multimedia
 Messaging Service (MMS) [15].
 </paragraph>
 <paragraph>
 References are contained in <xref type="rfc" data="rfc4355"/>.
 </paragraph>
 </functionalspec>
 <security>
 <paragraph>
 There are no specific security issues with this
 Enumservice. However, the general considerations of
 Section 6 of <xref type="rfc" data="rfc4355"/> apply.
 </paragraph>
 </security>
 <usage>COMMON</usage>
 <registrationdocs>
 <xref type="rfc" data="rfc4355"/> (updated by RFC 6118)
 <xref type="rfc" data="RFC 6118"/>
 </registrationdocs>
 <requesters>
 <xref type="person" data="Rudolf_Brandner"/>
 <xref type="person" data="Lawrence_Conroy"/>
 <xref type="person" data="Richard_Stastny"/>
 </requesters>
 <additionalinfo>
 <paragraph>
 Note that MMS can be used as an alternative to
 deliver an SMS RP-DATA RPDU if, for example, the
 SMS bearer is not supported. If an entry includes
 this Enumservice, then in effect this can be taken
 as implying that the recipient is capable of
 receiving EMS or SMS messages at this address. Such
 choices on the end system design do have two small
 caveats; whilst in practice all terminals supporting
 MMS today support SMS as well, it might not
 necessarily be the case in the future, and there may



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 be tariff differences in using the MMS rather than
 using the SMS or EMS.
 </paragraph>
 </additionalinfo>
 </record>

4.14. pres

 <record>
 <!-- pres -->
 <class>Application-Based, Common</class>
 <type>pres</type>
 <!-- No subtype -->
 <urischeme>pres</urischeme>
 <functionalspec>
 See <xref type="rfc" data="rfc3953"/>, Section 4.
 </functionalspec>
 <security>
 See <xref type="rfc" data="rfc3953"/>, Section 6.
 </security>
 <usage>COMMON</usage>
 <registrationdocs>
 <xref type="rfc" data="rfc3953"/> (updated by RFC 6118)
 <xref type="rfc" data="RFC 6118"/>
 </registrationdocs>
 <requesters>
 <xref type="person" data="Jon_Peterson"/>
 </requesters>
 <additionalinfo>
 <paragraph>
 See <xref type="rfc" data="rfc3953"/>, Section 3.
 </paragraph>
 </additionalinfo>
 </record>

















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4.15. pstn:sip

 <record>
 <!-- pstn:sip -->
 <class>Application-Based, Common</class>
 <type>pstn</type>
 <subtype>sip</subtype>
 <urischeme>sip</urischeme>
 <functionalspec>
 <paragraph>
 These Enumservices indicate that the
 resource identified can be addressed by the
 associated URI in order to initiate a
 telecommunication session, which may include two-way
 voice or other communications, to the PSTN.
 </paragraph>
 </functionalspec>
 <security>
 See <xref type="rfc" data="rfc4769"/>, Section 7.
 </security>
 <usage>COMMON</usage>
 <registrationdocs>
 <xref type="rfc" data="rfc4769"/> (updated by RFC 6118)
 <xref type="rfc" data="RFC 6118"/>
 </registrationdocs>
 <requesters>
 <xref type="person" data="Jason_Livingood"/>
 <xref type="person" data="Richard_Shockey"/>
 </requesters>
 <additionalinfo>
 <paragraph>
 A Number Portability Dip Indicator (npdi) should
 be used in practice
 (see <xref type="rfc" data="rfc4769"/>, Section 4).
 </paragraph>
 </additionalinfo>
 </record>














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4.16. pstn:tel

 <record>
 <!-- pstn:tel -->
 <class>Application-Based, Ancillary</class>
 <type>pstn</type>
 <subtype>tel</subtype>
 <urischeme>tel</urischeme>
 <functionalspec>
 <paragraph>
 These Enumservices indicate that the
 resource identified can be addressed by the
 associated URI in order to initiate a
 telecommunication session, which may include two-way
 voice or other communications, to the PSTN. These
 URIs may contain number portability data as
 specified in RFC4694 [10].
 </paragraph>
 <paragraph>
 References are contained in <xref type="rfc" data="rfc4769"/>.
 </paragraph>
 </functionalspec>
 <security>
 See <xref type="rfc" data="rfc4769"/>, Section 7.
 </security>
 <usage>COMMON</usage>
 <registrationdocs>
 <xref type="rfc" data="rfc4769"/> (updated by RFC 6118)
 <xref type="rfc" data="RFC 6118"/>
 </registrationdocs>
 <requesters>
 <xref type="person" data="Jason_Livingood"/>
 <xref type="person" data="Richard_Shockey"/>
 </requesters>
 <additionalinfo>
 <paragraph>
 A Number Portability Dip Indicator (npdi) should
 be used in practice
 (see <xref type="rfc" data="rfc4769"/>, Section 4).
 </paragraph>
 </additionalinfo>
 </record>









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4.17. sip

 <record>
 <!-- sip -->
 <class>Protocol-Based</class>
 <type>sip</type>
 <!-- No subtype -->
 <urischeme>sip</urischeme>
 <urischeme>sips</urischeme>
 <functionalspec>
 See <xref type="rfc" data="rfc3764"/>, Section 4.
 </functionalspec>
 <security>
 See <xref type="rfc" data="rfc3764"/>, Section 6.
 </security>
 <usage>COMMON</usage>
 <registrationdocs>
 <xref type="rfc" data="rfc3764"/> (updated by RFC 6118)
 <xref type="rfc" data="RFC 6118"/>
 </registrationdocs>
 <requesters>
 <xref type="person" data="Jon_Peterson"/>
 </requesters>
 <additionalinfo>
 <paragraph>
 See <xref type="rfc" data="rfc3764"/>, Section 3.
 </paragraph>
 </additionalinfo>
 </record>






















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4.18. sms:mailto

 <record>
 <!-- sms:mailto -->
 <class>Application-Based, Common</class>
 <type>sms</type>
 <subtype>mailto</subtype>
 <urischeme>mailto</urischeme>
 <functionalspec>
 <paragraph>
 This Enumservice indicates that the resource
 identified by the associated URI is capable
 of receiving a message using an email protocol.
 </paragraph>
 <paragraph>
 SMS content is sent over SMTP using the format
 specified by TS 23.140 [15] Section 8.4.4 and TS
 26.140 [16] Section 4, as an MMS message. Within
 such a message, SMS content is carried as either a
 text or application/octet-stream MIME sub-part (see
 TS 26.140 [16], Section 4.1)
 </paragraph>
 <paragraph>
 References are contained in <xref type="rfc" data="rfc4355"/>.
 </paragraph>
 </functionalspec>
 <security>
 <paragraph>
 There are no specific security issues with this
 Enumservice. However, the general considerations of
 Section 6 of <xref type="rfc" data="rfc4355"/> apply.
 </paragraph>
 </security>
 <usage>COMMON</usage>
 <registrationdocs>
 <xref type="rfc" data="rfc4355"/> (updated by RFC 6118)
 <xref type="rfc" data="RFC 6118"/>
 </registrationdocs>
 <requesters>
 <xref type="person" data="Rudolf_Brandner"/>
 <xref type="person" data="Lawrence_Conroy"/>
 <xref type="person" data="Richard_Stastny"/>
 </requesters>
 </record>







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4.19. sms:tel

 <record>
 <!-- sms:tel -->
 <class>Application-Based, Common</class>
 <type>sms</type>
 <subtype>tel</subtype>
 <urischeme>tel</urischeme>
 <functionalspec>
 <paragraph>
 This Enumservice indicates that the resource
 identified by the associated URI is capable
 of receiving a message using the Short Message
 Service (SMS) [14].
 </paragraph>
 <paragraph>
 References are contained in <xref type="rfc" data="rfc4355"/>.
 </paragraph>
 </functionalspec>
 <security>
 <paragraph>
 There are no specific security issues with this
 Enumservice. However, the general considerations of
 Section 6 of <xref type="rfc" data="rfc4355"/> apply.
 </paragraph>
 </security>
 <usage>COMMON</usage>
 <registrationdocs>
 <xref type="rfc" data="rfc4355"/> (updated by RFC 6118)
 <xref type="rfc" data="RFC 6118"/>
 </registrationdocs>
 <requesters>
 <xref type="person" data="Rudolf_Brandner"/>
 <xref type="person" data="Lawrence_Conroy"/>
 <xref type="person" data="Richard_Stastny"/>
 </requesters>
 </record>














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4.20. unifmsg:http

 <record>
 <!-- unifmsg:http -->
 <class>Application-Based, Common</class>
 <type>unifmsg</type>
 <subtype>http</subtype>
 <urischeme>http</urischeme>
 <functionalspec>
 <paragraph>
 This Enumservice indicates that the resource identified by
 the associated URI scheme is capable of being a source of
 information.
 </paragraph>
 <paragraph>
 Note that the kind of information retrieved can be manifold.
 Usually, contacting a resource by an 'http:' [11] URI
 provides a document. This document can contain references
 that will trigger the download of many different kinds of
 information, such as text, audio, video, executable code, or
 even video message files. Thus, one cannot be more specific
 about the kind of information expected when contacting the
 resource.
 </paragraph>
 <paragraph>
 References are contained in <xref type="rfc" data="rfc5278"/>.
 </paragraph>
 </functionalspec>
 <security>
 See <xref type="rfc" data="rfc5278"/>, Section 3.
 </security>
 <usage>COMMON</usage>
 <registrationdocs>
 <xref type="rfc" data="rfc5278"/> (updated by RFC 6118)
 <xref type="rfc" data="RFC 6118"/>
 </registrationdocs>
 <requesters>
 <xref type="person" data="Jason_Livingood"/>
 <xref type="person" data="Don_Troshynski"/>
 </requesters>
 <additionalinfo>
 <paragraph>
 Implementers should review a non-exclusive list of examples
 in Section 7 of <xref type="rfc" data="rfc5278"/>.
 </paragraph>
 </additionalinfo>
 </record>




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4.21. unifmsg:https

 <record>
 <!-- unifmsg:https -->
 <class>Application-Based, Common</class>
 <type>unifmsg</type>
 <subtype>https</subtype>
 <urischeme>https</urischeme>
 <functionalspec>
 <paragraph>
 This Enumservice indicates that the resource identified by
 the associated URI scheme is capable of being a source of
 information, which can be contacted using TLS or the Secure
 Socket Layer protocol.
 </paragraph>
 <paragraph>
 Note that the kind of information retrieved can be manifold.
 Usually, contacting a resource by an 'https:' [12] URI
 provides a document. This document can contain references
 that will trigger the download of many different kinds of
 information, such as text, audio, video, executable code, or
 even video message files. Thus, one cannot be more specific
 about the kind of information expected when contacting the
 resource.
 </paragraph>
 <paragraph>
 References are contained in <xref type="rfc" data="rfc5278"/>.
 </paragraph>
 </functionalspec>
 <security>
 See <xref type="rfc" data="rfc5278"/>, Section 3.
 </security>
 <usage>COMMON</usage>
 <registrationdocs>
 <xref type="rfc" data="rfc5278"/> (updated by RFC 6118)
 <xref type="rfc" data="RFC 6118"/>
 </registrationdocs>
 <requesters>
 <xref type="person" data="Jason_Livingood"/>
 <xref type="person" data="Don_Troshynski"/>
 </requesters>
 <additionalinfo>
 <paragraph>
 Implementers should review a non-exclusive list of examples
 in Section 7 of <xref type="rfc" data="rfc5278"/>.
 </paragraph>
 </additionalinfo>
 </record>



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4.22. unifmsg:sip

 <record>
 <!-- unifmsg:sip -->
 <class>Application-Based, Common</class>
 <type>unifmsg</type>
 <subtype>sip</subtype>
 <urischeme>sip</urischeme>
 <functionalspec>
 <paragraph>
 This Enumservice indicates that the resource identified can
 be addressed by the associated URI scheme in order to
 initiate a unified communication session to a unified
 messaging system.
 </paragraph>
 </functionalspec>
 <security>
 See <xref type="rfc" data="rfc5278"/>, Section 3.
 </security>
 <usage>COMMON</usage>
 <registrationdocs>
 <xref type="rfc" data="rfc5278"/> (updated by RFC 6118)
 <xref type="rfc" data="RFC 6118"/>
 </registrationdocs>
 <requesters>
 <xref type="person" data="Jason_Livingood"/>
 <xref type="person" data="Don_Troshynski"/>
 </requesters>
 <additionalinfo>
 <paragraph>
 Implementers should review a non-exclusive list of examples
 in Section 7 of <xref type="rfc" data="rfc5278"/>.
 </paragraph>
 </additionalinfo>
 </record>
















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4.23. unifmsg:sips

 <record>
 <!-- unifmsg:sips -->
 <class>Application-Based, Common</class>
 <type>unifmsg</type>
 <subtype>sips</subtype>
 <urischeme>sips</urischeme>
 <functionalspec>
 <paragraph>
 This Enumservice indicates that the resource identified can
 be addressed by the associated URI scheme in order to
 initiate a unified communication session to a unified
 messaging system.
 </paragraph>
 </functionalspec>
 <security>
 See <xref type="rfc" data="rfc5278"/>, Section 3.
 </security>
 <usage>COMMON</usage>
 <registrationdocs>
 <xref type="rfc" data="rfc5278"/> (updated by RFC 6118)
 <xref type="rfc" data="RFC 6118"/>
 </registrationdocs>
 <requesters>
 <xref type="person" data="Jason_Livingood"/>
 <xref type="person" data="Don_Troshynski"/>
 </requesters>
 <additionalinfo>
 <paragraph>
 Implementers should review a non-exclusive list of examples
 in Section 7 of <xref type="rfc" data="rfc5278"/>.
 </paragraph>
 </additionalinfo>
 </record>
















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4.24. vcard

 <record>
 <!-- vcard -->
 <class>Data Type-Based</class>
 <type>vcard</type>
 <!-- No subtype -->
 <urischeme>http</urischeme>
 <urischeme>https</urischeme>
 <functionalspec>
 <paragraph>
 This Enumservice indicates that the resource
 identified is a plain vCard, according to RFC2426,
 which may be accessed using HTTP / HTTPS [7].
 </paragraph>
 <paragraph>
 Clients fetching the vCard from the resource
 indicated should expect access to be
 restricted. Additionally, the comprehension of the
 data provided may vary depending on the client's
 identity.
 </paragraph>
 <paragraph>
 References are contained in <xref type="rfc" data="rfc4969"/>.
 </paragraph>
 </functionalspec>
 <security>
 See <xref type="rfc" data="rfc4969"/>, Section 5.
 </security>
 <usage>COMMON</usage>
 <registrationdocs>
 <xref type="rfc" data="rfc4969"/> (updated by RFC 6118)
 <xref type="rfc" data="RFC 6118"/>
 </registrationdocs>
 <requesters>
 <xref type="person" data="Alexander_Mayrhofer"/>
 </requesters>
 </record>













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4.25. videomsg:http

 <record>
 <!-- videomsg:http -->
 <class>Application-Based, Common</class>
 <type>videomsg</type>
 <subtype>http</subtype>
 <urischeme>http</urischeme>
 <functionalspec>
 <paragraph>
 This Enumservice indicates that the resource identified by
 the associated URI scheme is capable of being a source of
 information.
 </paragraph>
 <paragraph>
 Note that the kind of information retrieved can be manifold.
 Usually, contacting a resource by an 'http:' [11] URI
 provides a document. This document can contain references
 that will trigger the download of many different kinds of
 information, such as text, audio, video, executable code, or
 even video message files. Thus, one cannot be more specific
 about the kind of information expected when contacting the
 resource.
 </paragraph>
 <paragraph>
 References are contained in <xref type="rfc" data="rfc5278"/>.
 </paragraph>
 </functionalspec>
 <security>
 See <xref type="rfc" data="rfc5278"/>, Section 3.
 </security>
 <usage>COMMON</usage>
 <registrationdocs>
 <xref type="rfc" data="rfc5278"/> (updated by RFC 6118)
 <xref type="rfc" data="RFC 6118"/>
 </registrationdocs>
 <requesters>
 <xref type="person" data="Jason_Livingood"/>
 <xref type="person" data="Don_Troshynski"/>
 </requesters>
 <additionalinfo>
 <paragraph>
 Implementers should review a non-exclusive list of examples
 in Section 7 of <xref type="rfc" data="rfc5278"/>.
 </paragraph>
 </additionalinfo>
 </record>




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4.26. videomsg:https

 <record>
 <!-- videomsg:https -->
 <class>Application-Based, Common</class>
 <type>videomsg</type>
 <subtype>https</subtype>
 <urischeme>https</urischeme>
 <functionalspec>
 <paragraph>
 This Enumservice indicates that the resource identified by
 the associated URI scheme is capable of being a source of
 information, which can be contacted using TLS or the Secure
 Socket Layer protocol.
 </paragraph>
 <paragraph>
 Note that the kind of information retrieved can be manifold.
 Usually, contacting a resource by an 'https:' [12] URI
 provides a document. This document can contain references
 that will trigger the download of many different kinds of
 information, such as text, audio, video, executable code, or
 even video message files. Thus, one cannot be more specific
 about the kind of information expected when contacting the
 resource.
 </paragraph>
 <paragraph>
 References are contained in <xref type="rfc" data="rfc5278"/>.
 </paragraph>
 </functionalspec>
 <security>
 See <xref type="rfc" data="rfc5278"/>, Section 3.
 </security>
 <usage>COMMON</usage>
 <registrationdocs>
 <xref type="rfc" data="rfc5278"/> (updated by RFC 6118)
 <xref type="rfc" data="RFC 6118"/>
 </registrationdocs>
 <requesters>
 <xref type="person" data="Jason_Livingood"/>
 <xref type="person" data="Don_Troshynski"/>
 </requesters>
 <additionalinfo>
 <paragraph>
 Implementers should review a non-exclusive list of examples
 in Section 7 of <xref type="rfc" data="rfc5278"/>.
 </paragraph>
 </additionalinfo>
 </record>



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4.27. videomsg:sip

 <record>
 <!-- videomsg:sip -->
 <class>Application-Based, Common</class>
 <type>videomsg</type>
 <subtype>sip</subtype>
 <urischeme>sip</urischeme>
 <functionalspec>
 <paragraph>
 This Enumservice indicates that the resource identified can
 be addressed by the associated URI scheme in order to
 initiate a video communication session to a video messaging
 system.
 </paragraph>
 </functionalspec>
 <security>
 See <xref type="rfc" data="rfc5278"/>, Section 3.
 </security>
 <usage>COMMON</usage>
 <registrationdocs>
 <xref type="rfc" data="rfc5278"/> (updated by RFC 6118)
 <xref type="rfc" data="RFC 6118"/>
 </registrationdocs>
 <requesters>
 <xref type="person" data="Jason_Livingood"/>
 <xref type="person" data="Don_Troshynski"/>
 </requesters>
 <additionalinfo>
 <paragraph>
 Implementers should review a non-exclusive list of examples
 in Section 7 of <xref type="rfc" data="rfc5278"/>.
 </paragraph>
 </additionalinfo>
 </record>
















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4.28. videomsg:sips

 <record>
 <!-- videomsg:sips -->
 <class>Application-Based, Common</class>
 <type>videomsg</type>
 <subtype>sips</subtype>
 <urischeme>sips</urischeme>
 <functionalspec>
 <paragraph>
 This Enumservice indicates that the resource identified can
 be addressed by the associated URI scheme in order to
 initiate a video communication session to a video messaging
 system.
 </paragraph>
 </functionalspec>
 <security>
 See <xref type="rfc" data="rfc5278"/>, Section 3.
 </security>
 <usage>COMMON</usage>
 <registrationdocs>
 <xref type="rfc" data="rfc5278"/> (updated by RFC 6118)
 <xref type="rfc" data="RFC 6118"/>
 </registrationdocs>
 <requesters>
 <xref type="person" data="Jason_Livingood"/>
 <xref type="person" data="Don_Troshynski"/>
 </requesters>
 <additionalinfo>
 <paragraph>
 Implementers should review a non-exclusive list of examples
 in Section 7 of <xref type="rfc" data="rfc5278"/>.
 </paragraph>
 </additionalinfo>
 </record>
















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4.29. voice:tel

 <record>
 <!-- voice:tel -->
 <class>Application-Based, Common</class>
 <type>voice</type>
 <subtype>tel</subtype>
 <urischeme>tel</urischeme>
 <functionalspec>
 <paragraph>
 The kind of communication indicated by this
 Enumservice is "Interactive Voice". From a protocol
 perspective, this communication is expected to
 involve bidirectional media streams carrying audio
 data.
 </paragraph>
 <paragraph>
 A client may imply that the person controlling
 population of a NAPTR holding this Enumservice
 indicates their capability to engage in an
 interactive voice session when contacted using the
 URI generated by this NAPTR.
 </paragraph>
 </functionalspec>
 <security>
 See <xref type="rfc" data="rfc4415"/>, Section 5.
 </security>
 <usage>COMMON</usage>
 <registrationdocs>
 <xref type="rfc" data="rfc4415"/> (updated by RFC 6118)
 <xref type="rfc" data="RFC 6118"/>
 </registrationdocs>
 <requesters>
 <xref type="person" data="Rudolf_Brandner"/>
 <xref type="person" data="Lawrence_Conroy"/>
 <xref type="person" data="Richard_Stastny"/>
 </requesters>
 <additionalinfo>
 <paragraph>
 This Enumservice indicates that the person
 responsible for the NAPTR is accessible via the PSTN
 (Public Switched Telephone Network) or PLMN (Public
 Land Mobile Network) using the value of the
 generated URI.
 </paragraph>
 <paragraph>The kind of subsystem required to initiate a
 Voice Enumservice with this Subtype is a "Dialler".
 This is a subsystem that either provides a local



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 connection to the PSTN or PLMN, or that provides an
 indirect connection to those networks. The
 subsystem will use the telephone number held in the
 generated URI to place a voice call. The voice call
 is placed to a network that uses E.164 numbers to
 route calls to an appropriate destination.
 </paragraph>
 <paragraph>
 Note that the PSTN/PLMN connection may be
 indirect. The end user receiving this NAPTR may
 have a relationship with a Communications Service
 Provider that accepts call initiation requests from
 that subsystem using an IP-based protocol such as
 SIP or H.323, and places the call to the PSTN using
 a remote gateway service. In this case, the Provider
 may either accept requests using "tel:" URIs or has
 a defined mechanism to convert "tel:" URI values
 into a "protocol-native" form.
 </paragraph>
 <paragraph>
 The "tel:" URI value SHOULD be fully qualified
 (using the "global phone number" form of RFC 3966
 [10]). A "local phone number" as defined in that
 document SHOULD NOT be used unless the controller of
 the zone in which the NAPTR appears is sure that it
 can be distinguished unambiguously by all clients
 that can access the resource record and that a call
 from their network access points can be routed to
 that destination.
 </paragraph>
 <paragraph>
 References are contained in <xref type="rfc" data="rfc4415"/>.
 </paragraph>
 </additionalinfo>
 </record>
















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4.30. voicemsg:http

 <record>
 <!-- voicemsg:http -->
 <class>Application-Based, Common</class>
 <type>voicemsg</type>
 <subtype>http</subtype>
 <urischeme>http</urischeme>
 <functionalspec>
 <paragraph>
 This Enumservice indicates that the resource identified by
 the associated URI scheme is capable of being a source of
 information.
 </paragraph>
 <paragraph>
 Note that the kind of information retrieved can be manifold.
 Usually, contacting a resource by an 'http:' [11] URI
 provides a document. This document can contain references
 that will trigger the download of many different kinds of
 information, such as text, audio, video, executable code, or
 even voice message files. Thus, one cannot be more specific
 about the kind of information expected when contacting the
 resource.
 </paragraph>
 <paragraph>
 References are contained in <xref type="rfc" data="rfc5278"/>.
 </paragraph>
 </functionalspec>
 <security>
 See <xref type="rfc" data="rfc5278"/>, Section 3.
 </security>
 <usage>COMMON</usage>
 <registrationdocs>
 <xref type="rfc" data="rfc5278"/> (updated by RFC 6118)
 <xref type="rfc" data="RFC 6118"/>
 </registrationdocs>
 <requesters>
 <xref type="person" data="Jason_Livingood"/>
 <xref type="person" data="Don_Troshynski"/>
 </requesters>
 <additionalinfo>
 <paragraph>
 Implementers should review a non-exclusive list of examples
 in Section 7 of <xref type="rfc" data="rfc5278"/>.
 </paragraph>
 </additionalinfo>
 </record>




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4.31. voicemsg:https

 <record>
 <!-- voicemsg:https -->
 <class>Application-Based, Common</class>
 <type>voicemsg</type>
 <subtype>https</subtype>
 <urischeme>https</urischeme>
 <functionalspec>
 <paragraph>
 This Enumservice indicates that the resource identified by
 the associated URI scheme is capable of being a source of
 information, which can be contacted using TLS or the Secure
 Socket Layer protocol.
 </paragraph>
 <paragraph>
 Note that the kind of information retrieved can be manifold.
 Usually, contacting a resource by an 'https:' [12] URI
 provides a document. This document can contain references
 that will trigger the download of many different kinds of
 information, such as text, audio, video, executable code, or
 even voice message files. Thus, one cannot be more specific
 about the kind of information expected when contacting the
 resource.
 </paragraph>
 <paragraph>
 References are contained in <xref type="rfc" data="rfc5278"/>.
 </paragraph>
 </functionalspec>
 <security>
 See <xref type="rfc" data="rfc5278"/>, Section 3.
 </security>
 <usage>COMMON</usage>
 <registrationdocs>
 <xref type="rfc" data="rfc5278"/> (updated by RFC 6118)
 <xref type="rfc" data="RFC 6118"/>
 </registrationdocs>
 <requesters>
 <xref type="person" data="Jason_Livingood"/>
 <xref type="person" data="Don_Troshynski"/>
 </requesters>
 <additionalinfo>
 <paragraph>
 Implementers should review a non-exclusive list of examples
 in Section 7 of <xref type="rfc" data="rfc5278"/>.
 </paragraph>
 </additionalinfo>
 </record>



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4.32. voicemsg:sip

 <record>
 <!-- voicemsg:sip -->
 <class>Application-Based, Common</class>
 <type>voicemsg</type>
 <subtype>sip</subtype>
 <urischeme>sip</urischeme>
 <functionalspec>
 <paragraph>
 This Enumservice indicates that the resource identified can
 be addressed by the associated URI scheme in order to
 initiate a voice communication session to a voice messaging
 system.
 </paragraph>
 </functionalspec>
 <security>
 See <xref type="rfc" data="rfc5278"/>, Section 3.
 </security>
 <usage>COMMON</usage>
 <registrationdocs>
 <xref type="rfc" data="rfc5278"/> (updated by RFC 6118)
 <xref type="rfc" data="RFC 6118"/>
 </registrationdocs>
 <requesters>
 <xref type="person" data="Jason_Livingood"/>
 <xref type="person" data="Don_Troshynski"/>
 </requesters>
 <additionalinfo>
 <paragraph>
 Implementers should review a non-exclusive list of examples
 in Section 7 of <xref type="rfc" data="rfc5278"/>.
 </paragraph>
 </additionalinfo>
 </record>
















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4.33. voicemsg:sips

 <record>
 <!-- voicemsg:sips -->
 <class>Application-Based, Common</class>
 <type>voicemsg</type>
 <subtype>sips</subtype>
 <urischeme>sips</urischeme>
 <functionalspec>
 <paragraph>
 This Enumservice indicates that the resource identified can
 be addressed by the associated URI scheme in order to
 initiate a voice communication session to a voice messaging
 system.
 </paragraph>
 </functionalspec>
 <security>
 See <xref type="rfc" data="rfc5278"/>, Section 3.
 </security>
 <usage>COMMON</usage>
 <registrationdocs>
 <xref type="rfc" data="rfc5278"/> (updated by RFC 6118)
 <xref type="rfc" data="RFC 6118"/>
 </registrationdocs>
 <requesters>
 <xref type="person" data="Jason_Livingood"/>
 <xref type="person" data="Don_Troshynski"/>
 </requesters>
 <additionalinfo>
 <paragraph>
 Implementers should review a non-exclusive list of examples
 in Section 7 of <xref type="rfc" data="rfc5278"/>.
 </paragraph>
 </additionalinfo>
 </record>
















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4.34. voicemsg:tel

 <record>
 <!-- voicemsg:tel -->
 <class>Application-Based, Common</class>
 <type>voicemsg</type>
 <subtype>tel</subtype>
 <urischeme>tel</urischeme>
 <functionalspec>
 <paragraph>
 This Enumservice indicates that the resource identified can
 be addressed by the associated URI scheme in order to
 initiate a voice communication session to a voice messaging
 system.
 </paragraph>
 </functionalspec>
 <security>
 See <xref type="rfc" data="rfc5278"/>, Section 3.
 </security>
 <usage>COMMON</usage>
 <registrationdocs>
 <xref type="rfc" data="rfc5278"/> (updated by RFC 6118)
 <xref type="rfc" data="RFC 6118"/>
 </registrationdocs>
 <requesters>
 <xref type="person" data="Jason_Livingood"/>
 <xref type="person" data="Don_Troshynski"/>
 </requesters>
 <additionalinfo>
 <paragraph>
 Implementers should review a non-exclusive list of examples
 in Section 7 of <xref type="rfc" data="rfc5278"/>.
 </paragraph>
 </additionalinfo>
 </record>
















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4.35. vpim:ldap

 <record>
 <!-- vpim:ldap -->
 <class>Data Type-Based</class>
 <type>vpim</type>
 <subtype>ldap</subtype>
 <urischeme>ldap</urischeme>
 <functionalspec>
 See <xref type="rfc" data="rfc4238"/>, Section 3.2 - 3.3.
 </functionalspec>
 <security>
 <paragraph>
 Malicious Redirection:
 One of the fundamental dangers related to any
 service such as this is that a malicious entry in a
 resolver's database will cause clients to resolve
 the E.164 into the wrong LDAP URI. The possible
 intent may be to cause the client to connect to a
 rogue LDAP server and retrieve (or fail to retrieve)
 a resource containing fraudulent or damaging
 information.
 </paragraph>
 <paragraph>
 Denial of Service:
 By removing the URI to which the E.164 maps, a
 malicious intruder may remove the client's ability
 to access the LDAP directory server.
 </paragraph>
 </security>
 <usage>COMMON</usage>
 <registrationdocs>
 <xref type="rfc" data="rfc4238"/> (updated by RFC 6118)
 <xref type="rfc" data="RFC 6118"/>
 </registrationdocs>
 <requesters>
 <xref type="person" data="Greg_Vaudreuil"/>
 </requesters>
 </record>












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4.36. vpim:mailto

 <record>
 <!-- vpim:mailto -->
 <class>Data Type-Based</class>
 <type>vpim</type>
 <subtype>mailto</subtype>
 <urischeme>mailto</urischeme>
 <functionalspec>
 See <xref type="rfc" data="rfc4238"/>, Section 4.2 - 4.4.
 </functionalspec>
 <security>
 <paragraph>
 Malicious Redirection:
 One of the fundamental dangers related to any
 service such as this is that a malicious entry in a
 resolver's database will cause clients to resolve
 the E.164 into the wrong email URI. The possible
 intent may be to cause the client to send the
 information to an incorrect destination.
 </paragraph>
 <paragraph>
 Denial of Service:
 By removing the URI to which the E.164 maps, a
 malicious intruder may remove the client's ability
 to access the resource.
 </paragraph>
 <paragraph>
 Unsolicited Bulk Email:
 The exposure of email addresses through the ENUM
 service provides a bulk mailer access to large
 numbers of email addresses where only the telephone
 number was previously known.
 </paragraph>
 </security>
 <usage>COMMON</usage>
 <registrationdocs>
 <xref type="rfc" data="rfc4238"/> (updated by RFC 6118)
 <xref type="rfc" data="RFC 6118"/>
 </registrationdocs>
 <requesters>
 <xref type="person" data="Greg_Vaudreuil"/>
 </requesters>
 <additionalinfo>
 <paragraph>
 Error Conditions:
 </paragraph>
 <paragraph>



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 E.164 number not in the numbering plan
 </paragraph>
 <paragraph>
 E.164 number in the numbering plan, but no
 URIs exist for that number
 </paragraph>
 <paragraph>
 E2U+vpim:mailto Service unavailable of email
 addresses where only the telephone number was
 previously known.
 </paragraph>
 </additionalinfo>
 </record>






































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4.37. web:http

 <record>
 <!-- web:http -->
 <class>Application-Based, Common</class>
 <type>web</type>
 <subtype>http</subtype>
 <urischeme>http</urischeme>
 <functionalspec>
 <paragraph>
 This Enumservice indicates that the resource
 identified by the associated URI is capable
 of being a source of information. It has to be
 noted that the kind of information retrieved can be
 manifold. Usually, contacting a resource by an
 "http:" URI provides a document. This document can
 contain references that will trigger download of
 many different kinds of information, like audio or
 video or executable code. Thus, one cannot be more
 specific about the kind of information that can be
 expected when contacting the resource.
 </paragraph>
 </functionalspec>
 <security>
 See <xref type="rfc" data="rfc4002"/>, Section 5.
 </security>
 <usage>COMMON</usage>
 <registrationdocs>
 <xref type="rfc" data="rfc4002"/> (updated by RFC 6118)
 <xref type="rfc" data="RFC 6118"/>
 </registrationdocs>
 <requesters>
 <xref type="person" data="Rudolf_Brandner"/>
 <xref type="person" data="Lawrence_Conroy"/>
 <xref type="person" data="Richard_Stastny"/>
 </requesters>
 </record>














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4.38. web:https

 <record>
 <!-- web:https -->
 <class>Application-Based, Common</class>
 <type>web</type>
 <subtype>https</subtype>
 <urischeme>https</urischeme>
 <functionalspec>
 <paragraph>
 This Enumservice indicates that the resource
 identified by the associated URI is capable
 of being a source of information, which can be
 contacted by using TLS or the Secure Socket Layer
 protocol. It has to be noted that the kind of
 information retrieved can be manifold. Usually,
 contacting a resource by an "https:" URI provides a
 document. This document can contain all different
 kinds of information, like audio or video or
 executable code. Thus, one cannot be more specific
 what information to expect when contacting the
 resource.
 </paragraph>
 </functionalspec>
 <security>
 See <xref type="rfc" data="rfc4002"/>, Section 5.
 </security>
 <usage>COMMON</usage>
 <registrationdocs>
 <xref type="rfc" data="rfc4002"/> (updated by RFC 6118)
 <xref type="rfc" data="RFC 6118"/>
 </registrationdocs>
 <requesters>
 <xref type="person" data="Rudolf_Brandner"/>
 <xref type="person" data="Lawrence_Conroy"/>
 <xref type="person" data="Richard_Stastny"/>
 </requesters>
 </record>













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4.39. xmpp

 <record>
 <!-- xmpp -->
 <class>Protocol-Based</class>
 <type>xmpp</type>
 <!-- No subtype -->
 <urischeme>xmpp</urischeme>
 <functionalspec>
 <paragraph>
 This Enumservice indicates that the resource
 identified is an XMPP entity.
 </paragraph>
 </functionalspec>
 <security>
 See <xref type="rfc" data="rfc4979"/>, Section 6.
 </security>
 <usage>COMMON</usage>
 <registrationdocs>
 <xref type="rfc" data="rfc4979"/> (updated by RFC 6118)
 <xref type="rfc" data="RFC 6118"/>
 </registrationdocs>
 <requesters>
 <xref type="person" data="Alexander_Mayrhofer"/>
 </requesters>
 </record>

5. IANA Considerations

 IANA replaced all legacy Enumservice Registrations as per Section 4.

6. Security Considerations

 Since this document does not introduce any technology or protocol,
 there are no security issues to be considered for this document
 itself.

7. Acknowledgements

 The authors would like to thank the following people who have
 provided feedback or significant contributions to the development of
 this document: Jari Arkko, Scott Bradner, Gonzalo Camarillo, Alfred
 Hoenes, Ari Keranen, and Alexey Melnikov.








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8. References

8.1. Normative References

 [] Bradner, S., "The Internet Standards Process -- Revision
 3", BCP 9, RFC 2026, October 1996.

 [] Bradner, S., "Key words for use in RFCs to Indicate
 Requirement Levels", BCP 14, RFC 2119, March 1997.

 [] Faltstrom, P. and M. Mealling, "The E.164 to Uniform
 Resource Identifiers (URI) Dynamic Delegation Discovery
 System (DDDS) Application (ENUM)", RFC 3761, April 2004.

 [] Levin, O., "Telephone Number Mapping (ENUM) Service
 Registration for H.323", RFC 3762, April 2004.

 [] Peterson, J., "enumservice registration for Session
 Initiation Protocol (SIP) Addresses-of-Record", RFC 3764,
 April 2004.

 [] Peterson, J., "Telephone Number Mapping (ENUM) Service
 Registration for Presence Services", RFC 3953,
 January 2005.

 [] Brandner, R., Conroy, L., and R. Stastny, "IANA
 Registration for Enumservice 'web' and 'ft'", RFC 4002,
 February 2005.

 [] Toyoda, K. and D. Crocker, "Facsimile Using Internet Mail
 (IFAX) Service of ENUM", RFC 4143, November 2005.

 [] Vaudreuil, G., "Voice Message Routing Service", RFC 4238,
 October 2005.

 [] Brandner, R., Conroy, L., and R. Stastny, "IANA
 Registration for Enumservices email, fax, mms, ems, and
 sms", RFC 4355, January 2006.

 [] Brandner, R., Conroy, L., and R. Stastny, "IANA
 Registration for Enumservice Voice", RFC 4415,
 February 2006.

 [] Livingood, J. and R. Shockey, "IANA Registration for an
 Enumservice Containing Public Switched Telephone Network
 (PSTN) Signaling Information", RFC 4769, November 2006.





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 [] Mayrhofer, A., "IANA Registration for vCard Enumservice",
 RFC 4969, August 2007.

 [] Mayrhofer, A., "IANA Registration for Enumservice 'XMPP'",
 RFC 4979, August 2007.

 [] Mahy, R., "A Telephone Number Mapping (ENUM) Service
 Registration for Instant Messaging (IM) Services",
 RFC 5028, October 2007.

 [] Livingood, J. and D. Troshynski, "IANA Registration of
 Enumservices for Voice and Video Messaging", RFC 5278,
 July 2008.

 [] Mahy, R. and B. Hoeneisen, "IANA Registration of
 Enumservices for Internet Calendaring", RFC 5333,
 October 2009.

 [] Hoeneisen, B., Mayrhofer, A., and J. Livingood, "IANA
 Registration of Enumservices: Guide, Template, and IANA
 Considerations", RFC 6117, March 2011.

8.2. Informative References

 [] Narten, T. and H. Alvestrand, "Guidelines for Writing an
 IANA Considerations Section in RFCs", BCP 26, RFC 5226,
 May 2008.
























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Appendix A. Former Content of the IANA Repository

 Enumservice Registrations

 (last updated 2009-10-13)

 Registries included below:
 - Enumservice Registrations

 Registry Name: Enumservice Registrations
 Reference: [RFC3761]
 Registration Procedures: Require an RFC approved by the IESG

 Note:
 Enumservice specifications contain the functional specification (i.e.
 what it can be used for), the valid protocols, and the URI schemes
 that may be returned.

 Registry:
 Service Name: "H323"
 URI Scheme(s): "h323:"
 Functional Specification:
 See Section "3. The E2U+H323 ENUM Service" of [RFC3762]
 Security considerations:
 see section "5. Security Considerations" of [RFC3762]
 Intended usage: COMMON
 Author: Orit Levin
 [RFC3762]

 Service Name: "SIP"
 Type(s): "SIP"
 Subtype(s): N/A
 URI Scheme(s): "sip", "sips:"
 Functional Specification: see Section 4 of [RFC3764]
 Security considerations: see Section 6 of [RFC3764]
 Intended usage: COMMON
 Author: Jon Peterson (jon.peterson&neustar.biz)
 Any other information that the author deems interesting:
 see Section 3 of [RFC3764]
 [RFC3764]











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 Service Name: "ifax"
 Type: "ifax"
 Subtype: "mailto"
 URI Scheme: "mailto"
 The URI Scheme is "mailto" because facsimile is a profile of
 standard Internet mail and uses standard Internet mail
 addressing.
 Functional Specification: see section 1 of [RFC4143]
 Security Considerations: see section 3 of [RFC4143]
 Intended usage: COMMON
 Author: Kiyoshi Toyoda(toyoda.kiyoshi&jp.panasonic.com)
 Dave Crocker(dcrocker&brandenburg.com)
 [RFC4143]

 Service Name: "pres"
 URI Scheme(s): "pres:"
 Functional Specification: see Section 4 of [RFC3953]
 Security considerations: see Section 6 of [RFC3953]
 Intended usage: COMMON
 Author: Jon Peterson (jon.peterson&neustar.biz)
 Any other information that the author deems interesting:
 See Section 3 of [RFC3953]
 [RFC3953]

 Service Name: "web"
 Type: "web"
 Subtype: "http"
 URI Scheme: 'http:'
 Functional Specification:
 This ENUMservice indicates that the resource identified by the
 associated URI scheme is capable of being a source of
 information. It has to be noted that the kind of information
 retrieved can be manifold. Usually, contacting a resource by an
 'http:' URI provides a document. This document can contain
 references that will trigger download of many different kinds
 of information, like audio or video or executable code. Thus,
 one can not be more specific about the kind of information that
 can be expected when contacting the resource.
 Security Considerations:
 See section 5 of [RFC4002].
 Intended Usage: COMMON
 Authors:
 Rudolf Brandner (rudolf.brandner&siemens.com)
 Lawrence Conroy (lwc&roke.co.uk)
 Richard Stastny (richard.stastny&oefeg.at)
 Any other information the author deems interesting: None
 [RFC4002]




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 Service Name: "web"
 Type: "web"
 Subtype: "https"
 URI Scheme: 'https:'
 Functional Specification:
 This ENUMservice indicates that the resource identified by the
 associated URI scheme is capable of being a source of
 information, which can be contacted by using TLS or Secure
 Socket Layer protocol. It has to be noted that the kind of
 information retrieved can be manifold. Usually, contacting a
 resource by an 'https:' URI provides a document. This document
 can contain all different kind of information, like audio or
 video or executable code. Thus, one can not be more specific
 what information to expect when contacting the resource.
 Security Considerations:
 See section 5 of [RFC4002].
 Intended Usage: COMMON
 Authors:
 Rudolf Brandner (rudolf.brandner&siemens.com)
 Lawrence Conroy (lwc&roke.co.uk)
 Richard Stastny (richard.stastny&oefeg.at)
 Any other information the author deems interesting: None
 [RFC4002]

 Service Name: "ft"
 Type: "ft"
 Subtype: "ftp"
 URI Scheme: 'ftp:'
 Functional Specification:
 This ENUMservice indicates that the resource identified by the
 associated URI scheme is a file service from which a file or
 file listing can be retrieved.
 Security Considerations:
 See section 5 of [RFC4002].
 Intended Usage: COMMON
 Authors:
 Rudolf Brandner (rudolf.brandner&siemens.com)
 Lawrence Conroy (lwc&roke.co.uk)
 Richard Stastny (richard.stastny&oefeg.at)
 Any other information the author deems interesting: None
 [RFC4002]










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 Enumservice Name: "email"
 Enumservice Type: "email"
 Enumservice Subtype: "mailto"
 URI Scheme: 'mailto:'
 Functional Specification:
 This Enumservice indicates that the remote resource can be
 addressed by the associated URI scheme in order to send an
 email.
 Security Considerations:
 See Section 6 of [RFC4355]
 Intended Usage: COMMON
 Authors:
 Rudolf Brandner, Lawrence Conroy, Richard Stastny (for author
 contact detail see [RFC4355])
 Any other information the author deems interesting:
 None

 Enumservice Name: "fax"
 Enumservice Type: "fax"
 Enumservice Subtype: "tel"
 URI Scheme: 'tel:'
 Functional Specification:
 This Enumservice indicates that the resource identified by the
 associated URI scheme is capable of being contacted to provide
 a communication session during which facsimile documents can be
 sent.
 A client selecting this NAPTR will have support for generating
 and sending facsimile documents to the recipient using the PSTN
 session and transfer protocols specified in [12] and [13] in
 [RFC4355] - in short, they will have a fax
 program with a local or shared PSTN access over which they can
 send faxes.
 Security Considerations:
 See Section 6 of [RFC4355]
 Intended Usage: COMMON
 Authors:
 Rudolf Brandner, Lawrence Conroy, Richard Stastny (for author
 contact detail see [RFC4355])
 Any other information the author deems interesting:
 None











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 Enumservice Name: "sms"
 Enumservice Type: "sms"
 Enumservice Subtypes: "tel"
 URI Scheme: 'tel:'
 Functional Specification:
 This Enumservice indicates that the resource identified by the
 associated URI scheme is capable of receiving a message using
 the Short Message Service (SMS) [14] in [RFC4355].
 Security Considerations:
 There are no specific security issues with this Enumservice.
 However, the general considerations of Section 6 apply.
 Intended Usage: COMMON
 Authors:
 Rudolf Brandner, Lawrence Conroy, Richard Stastny (for author
 contact detail see [RFC4355])
 Any other information the author deems interesting:
 None

 Enumservice Name: "sms"
 Enumservice Type: "sms"
 Enumservice Subtypes: "mailto"
 URI Scheme: 'mailto:'
 Functional Specification:
 This Enumservice indicates that the resource identified by the
 associated URI scheme is capable of receiving a message using
 an email protocol.
 SMS content is sent over SMTP using the format specified by TS
 23.140 [15] section 8.4.4 and TS 26.140 [16] section 4 (for
 references see [RFC4355]), as an MMS message. Within such a
 message, SMS content is carried as either a text or
 application/octet-stream MIME sub-part (see TS 26.140 [16] ,
 section 4.1)
 For references see [RFC4355].
 Security Considerations:
 There are no specific security issues with this Enumservice.
 However, the general considerations of Section 6 apply, see
 [RFC4355].
 Intended Usage: COMMON
 Authors:
 Rudolf Brandner, Lawrence Conroy, Richard Stastny (for author
 contact detail see [RFC4355])
 Any other information the author deems interesting:
 None








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 Enumservice Name: "ems"
 Enumservice Type: "ems"
 Enumservice Subtype: "tel"
 URI Scheme: 'tel:'
 Functional Specification:
 This Enumservice indicates that the resource identified by the
 associated URI scheme is capable of receiving a message using
 the Enhanced Message Service (EMS) [14] (For reference see
 [RFC4355]).
 Security Considerations:
 There are no specific security issues with this Enumservice.
 However, the general considerations of Section 6 apply.
 See [RFC4355]
 Intended Usage: COMMON
 Authors:
 Rudolf Brandner, Lawrence Conroy, Richard Stastny (for author
 contact detail see [RFC4355])
 Any other information the author deems interesting:
 Note that an indication of EMS can be taken as implying that
 the recipient is capable of receiving SMS messages at this
 address as well.

 Enumservice Name: "ems"
 Enumservice Type: "ems"
 Enumservice Subtypes: "mailto"
 URI Scheme: 'mailto:'
 Functional Specification:
 This Enumservice indicates that the resource identified by the
 associated URI scheme is capable of receiving a message using
 an email protocol.
 EMS content is sent over SMTP using the format specified by TS
 23.140 [15] section 8.4.4 and TS 26.140 [16] section 4, as an
 MMS message. Within such a message, EMS content is carried as
 either a text or application/octet-stream MIME sub-part (see
 TS 26.140 [16] , section 4.1).
 For references see [RFC4355]
 Security Considerations:
 There are no specific security issues with this Enumservice.
 However, the general considerations of Section 6 of [RFC4355]
 apply.
 Intended Usage: COMMON
 Authors:
 Rudolf Brandner, Lawrence Conroy, Richard Stastny (for author
 contact detail see [RFC4355])
 Any other information the author deems interesting:
 None





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 Enumservice Name: "mms"
 Enumservice Type: "mms"
 Enumservice Subtype: "tel"
 URI Scheme: 'tel:'
 Functional Specification:
 This Enumservice indicates that the resource identified by the
 associated URI scheme is capable of receiving a message using
 the Multimedia Messaging Service (MMS) [15].
 For references see [RFC4355]
 Security Considerations:
 There are no specific security issues with this Enumservice.
 However, the general considerations of Section 6 of [RFC4355]
 apply.
 Intended Usage: COMMON
 Authors:
 Rudolf Brandner, Lawrence Conroy, Richard Stastny (for author
 contact detail see [RFC4355])
 Any other information the author deems interesting:
 Note that MMS can be used as an alternative to deliver an SMS
 RP-DATA RPDU if, for example, the SMS bearer is not supported.
 If an entry includes this Enumservice, then in effect this can
 be taken as implying that the recipient is capable of receiving
 EMS or SMS messages at this address. Such choices on the end
 system design do have two small caveats; whilst in practice all
 terminals supporting MMS today support SMS as well, it might
 not necessarily be the case in the future, and there may be
 tariff differences in using the MMS rather than using the SMS
 or EMS.

 Enumservice Name: "mms"
 Enumservice Type: "mms"
 Enumservice Subtypes: "mailto"
 URI Scheme: 'mailto:'
 Functional Specification:
 This Enumservice indicates that the resource identified by the
 associated URI scheme is capable of receiving a message using
 an email protocol.
 MMS messages are sent over SMTP using the format specified by
 TS 23.140 [15] section 8.4.4 and TS 26.140 [16] section 4.
 Within and between MMS Environments (MMSE, network
 infrastructures that support the MultiMedia Service), other
 pieces of state data (for example, charging-significant
 information) are exchanged between MMS Relay Servers. Thus,
 although these servers use SMTP as the "bearer" for their
 application exchanges, they map their internal state to
 specialised headers carried in the SMTP message exchanges.
 The headers used in such MMSE are described in detail in [17].
 For references see [RFC4355]



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 Security Considerations:
 There are no specific security issues with this Enumservice.
 However, the general considerations of Section 6 of [RFC4355]
 apply.
 Intended Usage: COMMON
 Authors:
 Rudolf Brandner, Lawrence Conroy, Richard Stastny (for author
 contact detail see [RFC4355])
 Any other information the author deems interesting:
 The MMS Architecture describes an interface between the MMSE and
 "legacy messaging systems" (labelled as MM3) which accepts
 "standard" SMTP messages. Thus although the MMS Relay Server
 that supports this interface appears as a standard SMTP server
 from the perspective of an Internet-based mail server, it acts
 as a gateway and translator, adding the internal state data that
 is used within and between the MMS Environments. This mechanism
 is described in [17], which also includes references to the
 specifications agreed by those bodies responsible for the design
 of the MMS.

 Service Name: E.164 to VPIM MailTo: URL
 URI Type: "Mailto:"
 Type: VPIM
 Subtype: MAILTO
 Functional Specification: See section 4.2 through 4.4 of [RFC4238]
 Intended Usage: COMMON
 Author: Greg Vaudreuil (gregv&ieee.org)
 Error Conditions:
 o E.164 number not in the numbering plan
 o E.164 number in the numbering plan, but no URLs exist for that
 number
 o E2U+VPIM:Mailto Service unavailable
 Security Considerations:
 o Malicious Redirection
 One of the fundamental dangers related to any service such as
 this is that a malicious entry in a resolver's database will
 cause clients to resolve the E.164 into the wrong email URL.
 The possible intent may be to cause the client to send the
 information to an incorrect destination.
 o Denial of Service
 By removing the URL to which the E.164 maps, a malicious
 intruder may remove the client's ability to access the
 resource.
 o Unsolicited Bulk Email
 The exposure of email addresses through the ENUM
 service provides a bulk mailer access to large numbers
 of email addresses where only the telephone number was
 previously known.



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 Service Name: E.164 to VPIM LDAP URL
 URI Type: "LDAP:"
 Type: VPIM
 Subtype: LDAP
 Functional Specification: See section 3.2 through 3.3 of [RFC4238]
 Intended Usage: COMMON
 Author: Greg Vaudreuil (gregv&ieee.org)
 Security Considerations:
 o Malicious Redirection
 One of the fundamental dangers related to any service
 such as this is that a malicious entry in a resolver's
 database will cause clients to resolve the E.164 into
 the wrong LDAP URL. The possible intent may be to cause
 the client to connect to a rogue LDAP server and
 retrieve (or fail to retrieve) a resource containing
 fraudulent or damaging information.
 o Denial of Service
 By removing the URL to which the E.164 maps, a
 malicious intruder may remove the client's ability to
 access the LDAP directory server.

 Enumservice Name: "voice"
 Enumservice Type: "voice"
 Enumservice Subtype: "tel"
 URI Scheme: 'tel:'
 Functional Specification:
 The kind of communication indicated by this Enumservice is
 "Interactive Voice". From a protocol perspective, this
 communication is expected to involve bidirectional media streams
 carrying audio data.
 A client may imply that the person controlling population of a
 NAPTR holding this Enumservice indicates their capability to
 engage in an interactive voice session when contacted using the
 URI generated by this NAPTR.
 Security Considerations:
 See Section 5 of [RFC4415]
 Intended Usage: COMMON
 Authors: Rudolf Brandner, Lawrence Conroy, Richard Stastny (for
 author contact detail see Authors' Addresses section)
 Any other information the author deems interesting:
 o This Enumservice indicates that the person responsible for the
 NAPTR is accessible via the PSTN (Public Switched Telephone
 Network) or PLMN (Public Land Mobile Network) using the value of
 the generated URI.
 o The kind of subsystem required to initiate a Voice Enumservice
 with this sub-type is a "Dialler". This is a subsystem that
 either provides a local connection to the PSTN or PLMN, or that
 provides an indirect connection to those networks. The



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 subsystem will use the telephone number held in the generated
 URI to place a voice call. The voice call is placed to a
 network that uses E.164 numbers to route calls to an appropriate
 destination.
 o Note that the PSTN/PLMN connection may be indirect. The end
 user receiving this NAPTR may have a relationship with a
 Communications Service Provider that accepts call initiation
 requests from that subsystem using an IP-based protocol such as
 SIP or H.323, and places the call to the PSTN using a remote
 gateway service. In this case the Provider may either accept
 requests using "tel:" URIs or has a defined mechanism to convert
 "tel:" URI values into a "protocol-native" form.
 o The "tel:" URI value SHOULD be fully qualified (using the
 "global phone number" form of RFC3966 [10]). A "local phone
 number" as defined in that document SHOULD NOT be used unless
 the controller of the zone in which the NAPTR appears is sure
 that it can be distinguished unambiguously by all clients that
 can access the resource record and that a call from their
 network access points can be routed to that destination.

 Enumservice Name: "pstn"
 Enumservice Type: "pstn"
 Enumservice Subtype: "tel"
 URI Scheme: 'tel:'
 Functional Specification:
 These Enumservices indicate that the remote resource identified
 can be addressed by the associated URI scheme in order to
 initiate a telecommunication session, which may include two-way
 voice or other communications, to the PSTN. These URIs may
 contain number portability data as specified in RFC 4694 [10].
 Security Considerations: See Section 7 of [RFC4769].
 Intended Usage: COMMON
 Authors:
 Jason Livingood (jason_livingood&cable.comcast.com)
 Richard Shockey (richard.shockey&neustar.biz)
 Any other information the author deems interesting:
 A Number Portability Dip Indicator (npdi) should be used in
 practice (see examples below in Section 4 of [RFC4769]).













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 Enumservice Name: "pstn"
 Enumservice Type: "pstn"
 Enumservice Subtype: "sip"
 URI Scheme: 'sip:'
 Functional Specification:
 These Enumservices indicate that the remote resource identified
 can be addressed by the associated URI scheme in order to
 initiate a telecommunication session, which may include two-way
 voice or other communications, to the PSTN.
 Security Considerations: See Section 7 of [RFC4769].
 Intended Usage: COMMON
 Authors:
 Jason Livingood (jason_livingood&cable.comcast.com)
 Richard Shockey (richard.shockey&neustar.biz)
 Any other information the author deems interesting:
 A Number Portability Dip Indicator (npdi) should be used in
 practice (see examples below in Section 4 of [RFC4769]).

 Enumservice Name: "vCard"
 Enumservice Name: "vCard"
 Enumservice Type: "vcard"
 Enumservice Subtype: n/a
 URI Schemes: "http", "https"
 Functional Specification:
 This Enumservice indicates that the resource identified is a
 plain vCard, according to RFC 2426, which may be accessed using
 HTTP/ HTTPS [7].
 Clients fetching the vCard from the resource indicated should
 expect access to be restricted. Additionally, the comprehension
 of the data provided may vary depending on the client's
 identity.
 Security Considerations: see Section 5 [RFC4969]
 Intended Usage: COMMON
 Author: Alexander Mayrhofer <alexander.mayrhofer&enum.at>

 Enumservice Name: "XMPP"
 Enumservice Type: "xmpp"
 Enumservice Subtype: n/a
 URI Schemes: "xmpp"
 Functional Specification:
 This Enumservice indicates that the resource identified is an
 XMPP entity.
 Security Considerations: see Section 6 of [RFC4979]
 Intended Usage: COMMON
 Author: Alexander Mayrhofer <alexander.mayrhofer&enum.at>






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 Enumservice Name: "im"
 Enumservice Type: "im"
 Enumservice Subtypes: N/A
 URI scheme(s): "im:"
 Functional Specification:
 This Enumservice indicates that the resource identified
 is an 'im:' URI. The 'im:' URI scheme does not identify
 any particular protocol that will be used to handle
 instant messaging receipt or delivery, rather the mechanism
 in RFC 3861 [4] is used to discover whether an IM protocol
 supported by the party querying ENUM is also supported by
 the target resource.
 Security considerations: See section 3 of [RFC5028]
 Intended usage: COMMON
 Author: Rohan Mahy (rohan&ekabal.com)

 Enumservice Name: "voicemsg"
 Enumservice Type: "voicemsg"
 Enumservice Subtypes: "sip"
 URI Schemes: 'sip:'
 Functional Specification:
 This Enumservice indicates that the remote resource identified
 can be addressed by the associated URI scheme in order to
 initiate a voice communication session to a voice messaging
 system.
 Security Considerations: See Section 3 of [RFC5278]
 Intended Usage: COMMON
 Authors:
 Jason Livingood (jason_livingood&cable.comcast.com)
 Don Troshynski (dtroshynski&acmepacket.com)
 Any other information the author deems interesting:
 Implementers should review a non-exclusive list of examples
 below in Section 7 of [RFC5278]

 Enumservice Name: "voicemsg"
 Enumservice Type: "voicemsg"
 Enumservice Subtypes: "sips"
 URI Schemes: 'sips:'
 Functional Specification:
 This Enumservice indicates that the remote resource identified
 can be addressed by the associated URI scheme in order to
 initiate a voice communication session to a voice messaging
 system.
 Security Considerations: See Section 3 of [RFC5278]
 Intended Usage: COMMON
 Authors:
 Jason Livingood (jason_livingood&cable.comcast.com)
 Don Troshynski (dtroshynski&acmepacket.com)



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 Any other information the author deems interesting:
 Implementers should review a non-exclusive list of examples
 below in Section 7 of [RFC5278]

 Enumservice Name: "voicemsg"
 Enumservice Type: "voicemsg"
 Enumservice Subtype: "tel"
 URI Schemes: 'tel:'
 Functional Specification:
 This Enumservice indicates that the remote resource identified
 can be addressed by the associated URI scheme in order to
 initiate a voice communication session to a voice messaging
 system.
 Security Considerations: See Section 3 of [RFC5278]
 Intended Usage: COMMON
 Authors:
 Jason Livingood (jason_livingood&cable.comcast.com)
 Don Troshynski (dtroshynski&acmepacket.com)
 Any other information the author deems interesting:
 Implementers should review a non-exclusive list of examples
 below in Section 7 of [RFC5278]

 Enumservice Name: "voicemsg"
 Enumservice Type: "voicemsg"
 Enumservice Subtype: "http"
 URI Schemes: 'http:'
 Functional Specification:
 This Enumservice indicates that the remote resource identified
 by the associated URI scheme is capable of being a source of
 information.
 Note that the kind of information retrieved can be manifold.
 Usually, contacting a resource by an 'http:' [11] URI provides a
 document. This document can contain references that will trigger
 the download of many different kinds of information, such as
 text, audio, video, executable code, or even voice message
 files. Thus, one cannot be more specific about the kind of
 information expected when contacting the resource.
 Security Considerations: See Section 3 of [RFC5278]
 Intended Usage: COMMON
 Authors:
 Jason Livingood (jason_livingood&cable.comcast.com)
 Don Troshynski (dtroshynski&acmepacket.com)
 Any other information the author deems interesting:
 Implementers should review a non-exclusive list of examples
 below in Section 7 of [RFC5278]






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 Enumservice Name: "voicemsg"
 Enumservice Type: "voicemsg"
 Enumservice Subtype: "https"
 URI Schemes: 'https:'
 Functional Specification:
 This Enumservice indicates that the remote resource identified
 by the associated URI scheme is capable of being a source of
 information, which can be contacted using TLS or the Secure
 Socket Layer protocol.
 Note that the kind of information retrieved can be manifold.
 Usually, contacting a resource by an 'https:' [12] URI provides
 a document. This document can contain references that will
 trigger the download of many different kinds of information,
 such as text, audio, video, executable code, or even voice
 message files. Thus, one cannot be more specific about the kind
 of information expected when contacting the resource.
 Security Considerations: See Section 3 of [RFC5278]
 Intended Usage: COMMON
 Authors:
 Jason Livingood (jason_livingood&cable.comcast.com)
 Don Troshynski (dtroshynski&acmepacket.com)
 Any other information the author deems interesting:
 Implementers should review a non-exclusive list of examples
 below in Section 7 of [RFC5278]

 Enumservice Name: "videomsg"
 Enumservice Type: "videomsg"
 Enumservice Subtypes: "sip"
 URI Schemes: 'sip:'
 Functional Specification:
 This Enumservice indicates that the remote resource identified
 can be addressed by the associated URI scheme in order to
 initiate a video communication session to a video messaging
 system.
 Security Considerations: See Section 3 of [RFC5278]
 Intended Usage: COMMON
 Authors:
 Jason Livingood (jason_livingood&cable.comcast.com)
 Don Troshynski (dtroshynski&acmepacket.com)
 Any other information the author deems interesting:
 Implementers should review a non-exclusive list of examples
 below in Section 7 of [RFC5278]









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 Enumservice Name: "videomsg"
 Enumservice Type: "videomsg"
 Enumservice Subtypes: "sips"
 URI Schemes: 'sips:'
 Functional Specification:
 This Enumservice indicates that the remote resource identified
 can be addressed by the associated URI scheme in order to
 initiate a video communication session to a video messaging
 system.
 Security Considerations: See Section 3 of [RFC5278]
 Intended Usage: COMMON
 Authors:
 Jason Livingood (jason_livingood&cable.comcast.com)
 Don Troshynski (dtroshynski&acmepacket.com)
 Any other information the author deems interesting:
 Implementers should review a non-exclusive list of examples
 below in Section 7 of [RFC5278]

 Enumservice Name: "videomsg"
 Enumservice Type: "videomsg"
 Enumservice Subtype: "http"
 URI Schemes: 'http:'
 Functional Specification:
 This Enumservice indicates that the remote resource identified
 by the associated URI scheme is capable of being a source of
 information.
 Note that the kind of information retrieved can be manifold.
 Usually, contacting a resource by an 'http:' [11] URI provides a
 document. This document can contain references that will trigger
 the download of many different kinds of information, such as
 text, audio, video, executable code, or even video message
 files. Thus, one cannot be more specific about the kind of
 information expected when contacting the resource.
 Security Considerations: See Section 3 of [RFC5278]
 Intended Usage: COMMON
 Authors:
 Jason Livingood (jason_livingood&cable.comcast.com)
 Don Troshynski (dtroshynski&acmepacket.com)
 Any other information the author deems interesting:
 Implementers should review a non-exclusive list of examples
 below in Section 7 of [RFC5278]










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 Enumservice Name: "videomsg"
 Enumservice Type: "videomsg"
 Enumservice Subtype: "https"
 URI Schemes: 'https:'
 Functional Specification:
 This Enumservice indicates that the remote resource identified
 by the associated URI scheme is capable of being a source of
 information, which can be contacted using TLS or the Secure
 Socket Layer protocol.
 Note that the kind of information retrieved can be manifold.
 Usually, contacting a resource by an 'https:' [12] URI provides
 a document. This document can contain references that will
 trigger the download of many different kinds of information,
 such as text, audio, video, executable code, or even video
 message files. Thus, one cannot be more specific about the kind
 of information expected when contacting the resource.
 Security Considerations: See Section 3 of [RFC5278]
 Intended Usage: COMMON
 Authors:
 Jason Livingood (jason_livingood&cable.comcast.com)
 Don Troshynski (dtroshynski&acmepacket.com)
 Any other information the author deems interesting:
 Implementers should review a non-exclusive list of examples
 below in Section 7 of [RFC5278]

 Enumservice Name: "unifmsg"
 Enumservice Type: "unifmsg"
 Enumservice Subtypes: "sip"
 URI Schemes: 'sip:'
 Functional Specification:
 This Enumservice indicates that the remote resource identified
 can be addressed by the associated URI scheme in order to
 initiate a unified communication session to a unified messaging
 system.
 Security Considerations: See Section 3 of [RFC5278]
 Intended Usage: COMMON
 Authors:
 Jason Livingood (jason_livingood&cable.comcast.com)
 Don Troshynski (dtroshynski&acmepacket.com)
 Any other information the author deems interesting:
 Implementers should review a non-exclusive list of examples
 below in Section 7 of [RFC5278]









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 Enumservice Name: "unifmsg"
 Enumservice Type: "unifmsg"
 Enumservice Subtypes: "sips"
 URI Schemes: 'sips:'
 Functional Specification:
 This Enumservice indicates that the remote resource identified
 can be addressed by the associated URI scheme in order to
 initiate a unified communication session to a unified messaging
 system.
 Security Considerations: See Section 3 of [RFC5278]
 Intended Usage: COMMON
 Authors:
 Jason Livingood (jason_livingood&cable.comcast.com)
 Any other information the author deems interesting:
 Implementers should review a non-exclusive list of examples
 below in Section 7 of [RFC5278]

 Enumservice Name: "unifmsg"
 Enumservice Type: "unifmsg"
 Enumservice Subtype: "http"
 URI Schemes: 'http:'
 Functional Specification:
 This Enumservice indicates that the remote resource identified
 by the associated URI scheme is capable of being a source of
 information.
 Note that the kind of information retrieved can be manifold.
 Usually, contacting a resource by an 'http:' [11] URI provides a
 document. This document can contain references that will trigger
 the download of many different kinds of information, such as
 text, audio, video, executable code, or even video message
 files. Thus, one cannot be more specific about the kind of
 information expected when contacting the resource.
 Security Considerations: See Section 3 of [RFC5278]
 Intended Usage: COMMON
 Authors:
 Jason Livingood (jason_livingood&cable.comcast.com)
 Don Troshynski (dtroshynski&acmepacket.com)
 Any other information the author deems interesting:
 Implementers should review a non-exclusive list of examples
 below in Section 7 of [RFC5278]











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 Enumservice Name: "unifmsg"
 Enumservice Type: "unifmsg"
 Enumservice Subtype: "https"
 URI Schemes: 'https:'
 Functional Specification:
 This Enumservice indicates that the remote resource identified
 by the associated URI scheme is capable of being a source of
 information, which can be contacted using TLS or the Secure
 Socket Layer protocol.
 Note that the kind of information retrieved can be manifold.
 Usually, contacting a resource by an 'https:' [12] URI provides
 a document. This document can contain references that will
 trigger the download of many different kinds of information,
 such as text, audio, video, executable code, or even video
 message files. Thus, one cannot be more specific about the kind
 of information expected when contacting the resource.
 Security Considerations: See Section 3 of [RFC5278]
 Intended Usage: COMMON
 Authors:
 Jason Livingood (jason_livingood&cable.comcast.com)
 Don Troshynski (dtroshynski&acmepacket.com)
 Any other information the author deems interesting:
 Implementers should review a non-exclusive list of examples
 below in Section 7 of [RFC5278]

 Enumservice Name: "ical-sched"
 Enumservice Type: "ical-sched"
 Enumservice Subtypes: "mailto"
 URI scheme(s): 'mailto:'
 Functional Specification:
 This Enumservice indicates that the resource identified can be
 addressed by the associated URI used for scheduling using
 Internet calendaring via Internet mail with the iMIP [6]
 protocol.
 Security considerations: See Section 4 of [RFC5333].
 Intended usage: COMMON
 Author:
 Rohan Mahy (rohan&ekabal.com)













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 Enumservice Name: "ical-access"
 Enumservice Type: "ical-access"
 Enumservice Subtypes: "http"
 URI scheme(s): 'http:'
 Functional Specification:
 This Enumservice indicates that the resource identified can be
 addressed by the associated URI in order to access a user's
 calendar (for example free/busy status) using the CalDAV [7]
 protocol for Internet calendaring.
 Security considerations: See Section 4 of [RFC5333].
 Intended usage: COMMON
 Author:
 Rohan Mahy (rohan&ekabal.com)

 Enumservice Name: "ical-access"
 Enumservice Type: "ical-access"
 Enumservice Subtypes: "https"
 URI scheme(s): 'https:'
 Functional Specification:
 This Enumservice indicates that the resource identified can be
 addressed by the associated URI in order to access a user's
 calendar (for example free/busy status) using the CalDAV [7]
 protocol for Internet calendaring.
 Security considerations: See Section 4 of [RFC5333].
 Intended usage: COMMON
 Author:
 Rohan Mahy (rohan&ekabal.com)
























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Authors' Addresses

 Bernie Hoeneisen
 Ucom Standards Track Solutions GmbH
 CH-8000 Zuerich
 Switzerland

 Phone: +41 44 500 52 44
 EMail: bernie@ietf.hoeneisen.ch (bernhard.hoeneisen AT ucom.ch)
 URI: http://www.ucom.ch/


 Alexander Mayrhofer
 enum.at GmbH
 Karlsplatz 1/9
 Wien A-1010
 Austria

 Phone: +43 1 5056416 34
 EMail: alexander.mayrhofer@enum.at
 URI: http://www.enum.at/






























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