Voice Message Routing Service
RFC 4238
Document | Type |
RFC - Proposed Standard
(October 2005; Errata)
Updated by RFC 6118
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Author | Gregory Vaudreuil | ||
Last updated | 2020-01-21 | ||
Stream | IETF | ||
Formats | plain text html pdf htmlized with errata bibtex | ||
Stream | WG state | (None) | |
Document shepherd | No shepherd assigned | ||
IESG | IESG state | RFC 4238 (Proposed Standard) | |
Action Holders |
(None)
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||
Consensus Boilerplate | Unknown | ||
Telechat date | |||
Responsible AD | Scott Hollenbeck | ||
Send notices to | (None) |
Network Working Group G. Vaudreuil Request for Comments: 4238 Lucent Technologies Category: Standards Track October 2005 Voice Message Routing Service 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. Copyright Notice Copyright (C) The Internet Society (2005). Abstract Voice messaging is traditionally addressed using telephone number addressing. This document describes two techniques for routing voice messages based on a telephone number. The complete service uses the Voice Profile for Internet Mail (VPIM) Directory service to lookup a VPIM email address with a telephone number and confirm that the address is both valid and associated with the intended recipient. However, this service will take time to become widely deployed in the near term. This document also describes a basic send-and-pray service that routes and delivers messages using only the ENUM telephone number resolution service and the existing DNS mail routing facilities. Vaudreuil Standards Track [Page 1] RFC 4238 Voice Message Routing Service October 2005 Table of Contents 1. Design Goals ....................................................2 2. The Complete Service ............................................3 2.1. Specification of Service "E2U+VPIM:LDAP" ...................3 2.2. VPIM Directory Discovery ...................................4 2.3. Address Query ..............................................4 3. The Basic Service ...............................................4 3.1. Specification of Service "E2U+VPIM:Mailto:" ................5 3.2. Address Construction .......................................6 3.3. Interdomain Message Routing ................................6 3.4. Intradomain Message Routing ................................6 3.4.1. Directory-Enabled Routing ...........................6 3.4.2. Service-based Mail Routing ..........................7 4. Security Considerations .........................................7 4.1. Unsolicited Bulk Email .....................................7 4.2. DNS-based Attacks ..........................................7 5. IANA Considerations .............................................8 6. References ......................................................8 6.1. Normative References .......................................8 6.2. Informative References .....................................8 1. Design Goals This profile is intended to provide a range of functional capabilities for message routing based on one of two mechanisms. The most complete service should use the ENUM address resolution service to determine the VPIM directory, and then use LDAP to retrieve the VPIM-specific email address that will be used for message routing. The more basic send-and-pray message service uses only the ENUM service and MX records to route the message to the intended recipient's domain. The intelligence to further route the message to the intended recipient is placed within the message routing system of the recipient's domain. The basic mechanism may be used even when there is a VPIM directory service available. The basic service is useful when LDAP queries are not available, such as may be the case for disconnected mobile terminals or because of firewall or information security policies. The basic mechanism should facilitate the routing of VPIM messages to a suitable internal destination with a minimum of configuration. It is an important goal to avoid any content-processing to determine the nature of the message and its internal destination. At a minimum, it should be possible to establish a simple mail forwarding rule that Vaudreuil Standards Track [Page 2] RFC 4238 Voice Message Routing Service October 2005 sends all inbound VPIM messages to a designated system, while facilitating the routing of FAX, SMS, or other telephone-addressed messages to other potentially different systems. It is a goal that the mechanisms outlined in this document be extensible for all store-and-forward, telephone-number addressed messaging services. It is a goal that the VPIM directory discovery and VPIM directory query steps occur within the timing constraints for user interfaces in PSTN networks. 95% of the time, that constraint can be a two-Show full document text