IANA Registration of Enumservices for Voice and Video Messaging
RFC 5278

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Network Working Group                                      J. Livingood
Request for Comments: 5278                 Comcast Cable Communications
Category: Standards Track                                 D. Troshynski
                                                            Acme Packet
                                                              July 2008

    IANA Registration of Enumservices for Voice and Video Messaging

Status of This Memo

   This document specifies an Internet standards track protocol for the
   Internet community, and requests discussion and suggestions for
   improvements.  Please refer to the current edition of the "Internet
   Official Protocol Standards" (STD 1) for the standardization state
   and status of this protocol.  Distribution of this memo is unlimited.

Abstract

   This document registers the Enumservice named "vmsg", which is used
   to facilitate the real-time routing of voice, video, and unified
   communications to a messaging system.  This vmsg Enumservice
   registers three Enumservice types: "voicemsg", "videomsg", and
   "unifmsg".  Each type also registers the subtypes "sip", "sips",
   "http", and "https", as well as the subtype "tel" for the "voicemsg"
   type.

Livingood & Troshynski      Standards Track                     [Page 1]
RFC 5278                    VMSG Enumservice                   July 2008

Table of Contents

   1. Introduction ....................................................3
      1.1. Selected Use Cases for Illustrative Purposes ...............4
      1.2. Consideration of Other Existing Enumservices ...............5
   2. Distribution of Data ............................................5
   3. Security Considerations .........................................5
   4. ENUM Service Registration for voicemsg ..........................6
      4.1. Registration for "voicemsg" with Subtype "sip" .............6
      4.2. Registration for "voicemsg" with Subtype "sips" ............7
      4.3. Registration for "voicemsg" with Subtype "tel" .............7
      4.4. Registration for "voicemsg" with Subtype "http" ............8
      4.5. Registration for "voicemsg" with Subtype "https" ...........9
   5. ENUM Service Registration for videomsg .........................10
      5.1. Registration for "videomsg" with Subtype "sip" ............10
      5.2. Registration for "videomsg" with Subtype "sips" ...........10
      5.3. Registration for "videomsg" with Subtype "http" ...........11
      5.4. Registration for "videomsg" with Subtype "https" ..........12
   6. ENUM Service Registration for unifmsg ..........................13
      6.1. Registration for "unifmsg" with Subtype "sip" .............13
      6.2. Registration for "unifmsg" with Subtype "sips" ............13
      6.3. Registration for "unifmsg" with Subtype "http" ............14
      6.4. Registration for "unifmsg" with Subtype "https" ...........15
   7. Selected Examples for Illustrative Purposes ....................16
      7.1. Example Using a 'sip' URI .................................16
      7.2. Example Using a 'tel' URI .................................16
      7.3. Example Using a Backreference .............................16
      7.4. Example Using a 'sip' URI without a Telephone Number ......17
      7.5. Example of Failover Using E2U+videomsg:sip ................17
   8. Implementation Recommendations .................................17
      8.1. Call Processing When Multiple Records Are Returned ........17
      8.2. NAPTR Configuration Issues ................................18
   9. IANA Considerations ............................................18
   10. Acknowledgements ..............................................18
   11. Contributors ..................................................19
   12. References ....................................................19
      12.1. Normative References .....................................19
      12.2. Informative References ...................................20

Livingood & Troshynski      Standards Track                     [Page 2]
RFC 5278                    VMSG Enumservice                   July 2008

1.  Introduction

   ENUM (E.164 Number Mapping, RFC 3761 [1]) is a technology that
   transforms E.164 numbers (the International Public Telecommunication
   Numbering Plan, ITU-T Recommendation E.164 [2]) into domain names and
   then uses DNS (Domain Name System, RFC 1034 [3]) delegation through
   NS records and Naming Authority Pointer (NAPTR) records (Dynamic
   Delegation Discovery System (DDDS) Part Three: The Domain Name System
   (DNS) Database, RFC 3403 [4]) to look up what services are available
   for a specific domain name.

   This document registers Enumservices according to the guidelines
   given in RFC 3761 [1] to be used for provisioning in the services
   field of a NAPTR [4] resource record to indicate the types of
   functionality associated with an end point and/or telephone number.