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ITU-T T.38 (2002) Amd. 2 (04/2004)

Support of RTP, version negotiation, insertion of "No signal"

Amendment 2 to Recommendation T.38 provides for the following updates:* Support of optional RTP encapsulation when using UDP transport. The optional RTP encapsulation is used when both gateways indicate this capability during call setup. * Description of the use of redundancy and FEC in the context of UDP/RTP. * Annex B and Annex D are updated to include negotiation of a RTP-based T.38 capability. * Annex G is added to specify the signaling of RTP encapsulation of T.38 as a generic H.245 capability.* Clarification of the version negotiation procedures introduced in T.38 Amendment 1.* Modification of "no-signal" to allow it to be sent between modem changes (currently practice in implementations).

Citation:	https://handle.itu.int/11.1002/1000/7239
Series title:	T series: Terminals for telematic services T.30-T.39: Facsimile – Group 3 protocols
Approval date:	2004-04-22
Provisional name:	T.Ifax2
Approval process:	AAP
Status:	Superseded
Observation:	Never published, directly consolidated in ITU-T Rec. ITU-T T.38 (04/2004). Only the electronic prepublished version is available on ITU Website
Maintenance responsibility:	ITU-T Study Group 21
Further details:	Patent statement(s) Development history

EditionsRelated Supplement(s)

Ed.	ITU-T Recommendation	Status	Summary	Table of Contents	Download
7	T.38 (11/2015)	In force	here	here	here
6.1	T.38 (2010) Amd. 1 (10/2014)	Superseded	here	here	here
6	T.38 (09/2010)	Superseded	here	here	here
6.0	T.38 (2010) Err. 1 (04/2013)	Superseded	-	-	here
5	T.38 (04/2007)	Superseded	here	here	here
4	T.38 (09/2005)	Superseded	here	here	here
3.1	T.38 (2004) Amd. 1 (01/2005)	Superseded	here	here	here
3	T.38 (04/2004)	Superseded	here	here	here
2.4	T.38 (2002) Amd. 2 (04/2004)	Superseded	here	-	here
2.3	T.38 (2002) Amd. 3 (01/2004)	Superseded	here	-	here
2.2	T.38 (2002) Amd. 1 (07/2003)	Superseded	here	-	here
2.1	T.38 (2002) Cor. 1 (07/2003)	Superseded	here	-	here
2	T.38 (03/2002)	Superseded	here	here	here
1.5	T.38 (1998) Amd. 4 (07/2001)	Superseded	here	-	here
1.4	T.38 (1998) Amd. 3 (11/2000)	Superseded	-	-	here
1.3	T.38 (1998) Cor. 1 (03/2000)	Superseded	-	-	here
1.2	T.38 (1998) Amd. 2 (02/2000)	Superseded	here	here	here
1.1	T.38 (1998) Amd. 1 (04/1999)	Superseded	here	here	here
1	T.38 (06/1998)	Superseded	here	here	here

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ITU-T Recommendations

ITU-T T.38 (2002) Amd. 2 (04/2004)