IANA Registration of the 'image' Media Type for the Session Description Protocol (SDP)
RFC 6466
| Document | Type |
RFC - Proposed Standard
(December 2011; No errata)
Was draft-salgueiro-mmusic-image-iana-registration (individual in rai area)
|
|
|---|---|---|---|
| Last updated | 2015-10-14 | ||
| Stream | IETF | ||
| Formats | plain text pdf html bibtex | ||
| Stream | WG state | (None) | |
| Document shepherd | No shepherd assigned | ||
| IESG | IESG state | RFC 6466 (Proposed Standard) | |
| Consensus Boilerplate | Unknown | ||
| Telechat date | |||
| Responsible AD | Gonzalo Camarillo | ||
| Send notices to | Miguel.A.Garcia@ericsson.com | ||
Internet Engineering Task Force (IETF) G. Salgueiro
Request for Comments: 6466 Cisco Systems
Category: Standards Track December 2011
ISSN: 2070-1721
IANA Registration of the 'image' Media Type
for the Session Description Protocol (SDP)
Abstract
This document describes the usage of the 'image' media type and
registers it with IANA as a top-level media type for the Session
Description Protocol (SDP). This media type is primarily used by SDP
to negotiate and establish T.38 media streams.
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/rfc6466.
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.
Salgueiro Standards Track [Page 1]
RFC 6466 'image' Media Type Registration December 2011
Table of Contents
1. Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Conventions Used in This Document . . . . . . . . . . . . . . . 3
3. IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 3
4. Security Considerations . . . . . . . . . . . . . . . . . . . . 4
5. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 4
6. References . . . . . . . . . . . . . . . . . . . . . . . . . . 5
6.1. Normative References . . . . . . . . . . . . . . . . . . . 5
6.2. Informative References . . . . . . . . . . . . . . . . . . 5
1. Overview
In an earlier version of the SDP specification [RFC2327] of
packetized media types, such as those used with the Real-time
Transport Protocol (RTP) [RFC3550], share the namespace with
Multipurpose Internet Mail Extensions (MIME) media types registry
[RFC4288] [RFC4289] (i.e., "MIME media types"). This is in contrast
to the latest version of the SDP specification [RFC4566], which
requested that an SDP-specific media type registry be created and
maintained by IANA. The top-level SDP media content types registered
by RFC 4566 [RFC4566] are 'audio', 'video', 'text', 'application',
and 'message'. A glaring omission from this list is the 'image'
media type.
The 'image' media type is an existing top-level MIME media type and
is widely used in SDP implementations for setting up T.38 Real-Time
Facsimile [T38] media streams. This media type is extensively
referenced by examples in ITU-T T.38 [T38] and IETF Standards Track
documents like RFC 4145 [RFC4145]. The following example shows the
media description of a T.38 media stream as commonly found in a
Session Initiation Protocol (SIP) [RFC3261] INVITE; it contains an
SDP offer for T.38 over both UDP Transport Layer (UDPTL) and TCP.
For the sake of brevity, only the SDP body of the SIP INVITE request
is displayed in this example.
Salgueiro Standards Track [Page 2]
RFC 6466 'image' Media Type Registration December 2011
v=0
o=alice 53655765 2353687637 IN IP4 pc33.example.com
s=SDP image example
c=IN IP4 192.0.2.2
t=0 0
m=image 49170 udptl t38
a=T38FaxVersion:0
a=T38MaxBitRate:14400
a=T38FaxRateManagement:transferredTCF
a=T38FaxMaxBuffer:262
a=T38FaxMaxDatagram:90
a=T38FaxUdpEC:t38UDPRedundancy
a=sendrecv
m=image 49172 tcp t38
a=T38FaxRateManagement:localTCF
The purpose of this document is to register with IANA the 'image'
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