| In force components  | 
Number
  | 
Title | 
Status | 
T.38 (11/15)     | 
Procedures for real-time Group 3 facsimile communication over IP networks
		 
 | 
In force 
  | 
     | 
| Superseded and Withdrawn components  | 
Number
  | 
Title | 
Status | 
T.38 (06/98)     | 
Procedures for real-time Group 3 facsimile communication over IP networks
		 
 | 
Superseded 
  | 
T.38 (1998) Amendment 1 (04/99)     | 
Revised Annex B on establishment procedures for facsimile communication over IP networks
		 
 | 
Superseded 
  | 
T.38 (1998) Amendment 2 (02/00)     | 
New Annexes D (SIP/SDP Call Establishment Procedures) and E (H.248 call establishment procedures)
		 
 | 
Superseded 
  | 
T.38 (1998) Corrigendum 1 (03/00)     | 
		 
 | 
Superseded 
  | 
T.38 (1998) Amendment 3 (11/00)     | 
Clarification of protocol version numbers, support for TPKT headers and transmission of DTMF over RTP, and updated support for Internet-Aware Fax devices and H.248.2
		  Never published, directly consolidated in ITU-T Rec. T.38 (03/2002). Only the electronic prepublished version is available on ITU Website
 | 
Superseded 
  | 
T.38 (1998) Amendment 4 (07/01)     | 
Clarification on use of T.30 Indicator and TCP start-up, update of Table 2, deletion of ASN.1 in Annex B
		 
 | 
Superseded 
  | 
T.38 (03/02)     | 
Procedures for real-time Group 3 facsimile communication over IP networks
		 
 | 
Superseded 
  | 
T.38 (2002) Corrigendum 1 (07/03)     | 
		  Never published, directly consolidated in ITU-T Rec. T.38 (04/2004). Only the electronic prepublished version is available on ITU Website
 | 
Superseded 
  | 
T.38 (2002) Amendment 1 (07/03)     | 
Support for half-duplex V.34 and V.150.1 interworking
		  Never published, directly consolidated in ITU-T Rec. T.38 (04/2004). Only the electronic prepublished version is available on ITU Website
 | 
Superseded 
  | 
T.38 (2002) Amendment 3 (01/04)     | 
Appendix V - T.38 implementation guidelines
		  Never published, directly consolidated in ITU-T Rec. T.38 (04/2004). Only the electronic prepublished version is available on ITU Website
 | 
Superseded 
  | 
T.38 (2002) Amendment 2 (04/04)     | 
Support of RTP, version negotiation, insertion of "No signal"
		  Never published, directly consolidated in ITU-T Rec. ITU-T T.38 (04/2004). Only the electronic prepublished version is available on ITU Website
 | 
Superseded 
  | 
T.38 (04/04)     | 
Procedures for real-time Group 3 facsimile communication over IP networks
		  This edition is a consolidation of ITU-T T.38 (2002), Cor.1 (07/2003), Amd.1 (07/2003), Amd.2 (04/2004) and Amd.3 (01/2004) without further modifications
 | 
Superseded 
  | 
T.38 (2004) Amendment 1 (01/05)     | 
Addition of vendor information in SIP/SDP call setup, corrections to Annex C and Annex D, and enhanced implementation guidelines
		 
 | 
Superseded 
  | 
T.38 (09/05)     | 
Procedures for real-time Group 3 facsimile communication over IP networks
		  
 | 
Superseded 
  | 
T.38 (04/07)     | 
Procedures for real-time Group 3 facsimile communication over IP networks
		 
 | 
Superseded 
  | 
T.38 (09/10)     | 
Procedures for real-time Group 3 facsimile communication over IP networks
		 
 | 
Superseded 
  | 
T.38 (2010) Erratum 1 (04/13)     | 
		 
 | 
Superseded 
  | 
T.38 (2010) Amendment 1 (10/14)     | 
New Appendix VI, clarifications and corrections
		 
 | 
Superseded 
  | 
T.Imp38/T.38 (02/00)     | 
T.38 Implementor's guide
		 
 | 
Superseded 
  | 
T.Imp38  (03/11)     | 
Implementors Guide for ITU-T T.38 (Procedures for real-time Group 3 facsimile communication over IP network)
		 
 | 
Superseded 
  | 
T.Imp38 (05/2012)     | 
Implementors Guide for ITU-T T.38 (Procedures for real-time Group 3 facsimile communication over IP network)
		 
 | 
Superseded 
  |