1 Scope
2 Normative references
3 Definitions
4 Abbreviations and acronyms
5 Introduction
5.1 Conventions
6 Communication between gateways
6.1 Internet protocol – TCP or UDP
6.2 Gateway facsimile data transfer functions
7 IFT protocol definition and procedures
7.1 General
7.2 IFP packet format
7.3 TYPE definitions
7.4 The IFP DATA element
7.5 Limitation of ITU-T V.21 frame packet size
8 IFP message flow for facsimile modulations up to ITU-T V.17
8.1 Data rate management method 1
8.2 Data rate management method 2
9 IFT over UDP transport
9.1 IFT over UDP transport using UDPTL protocol: IFT/UDPTL/UDP
9.2 IFT over UDP transport using RTP protocol: IFT/RTP/UDP
10 Message flow for ITU-T V.8 signals and Annex F of ITU-T V.34 facsimile
10.1 ITU-T V.8 negotiation
10.2 ITU-T V.34 data rate management
10.3 Facsimile mode
10.4 Compatibility with equipment conforming to prior versions of
this Recommendation
11 Security considerations
Annex A – ASN.1 notation
A.1 ITU-T T.38 (2002) ASN.1 notation
A.2 ITU-T T.38 (1998) ASN.1 notation
Annex B – ITU-T H.323 call establishment procedures
B.1 Introduction
B.2 Communication between facsimile terminal and gateway
B.3 Communication between gateways
Annex C – The optional forward error correction scheme for UDPTL
C.1 Overview of the optional forward error correction mechanism
C.2 Parity encode/decode scheme operation and characteristics
Annex D – SIP/SDP call establishment procedures
D.1 Introduction
D.2 Communication between gateways
Annex E – ITU-T H.248.1 call establishment procedures
E.1 Introduction
E.2 Communication between gateways
Annex F – Interworking procedures: ITU-T T.38 and ITU-T V.150.1 in the same
gateway
F.1 Introduction
F.2 SSE reason identifier codes for ITU-T T.38 transition
F.3 Mode override from ITU-T V.34 Group 3 facsimile to standard
Group 3 facsimile
F.4 External signalling
Annex G – ITU-T H.245 capability definition for ITU-T T.38 over RTP
Annex H – Signalled and provisioned ITU-T T.38 protocol parameters
H.1 Introduction
H.2 Transport conditional ITU-T T.38 parameters
H.3 Guidelines for signalling ITU-T T.38 protocol parameters
H.4 Legacy Interpretation of SDP Parameters
Appendix I – Session examples
I.1 Session examples
I.2 IAF device
Appendix II – Examples of call establishment procedures described in Annex B of
ITU‑T T.38
II.1 Sequence examples of call establishment procedures
II.2 Protocol data used in call establishment procedures
Appendix III – ITU-T H.248 call establishment procedure examples for
facsimile-capable media gateways
III.1 Introduction
III.2 Examples of call set-up
Appendix IV – ITU-T
V.34 session examples
IV.1 ITU-T V.34 session examples
Appendix V –
ITU-T T.38 implementation guidelines
V.1 General issue
V.2 IAF issues
V.3 Call set-up issues
V.4 Others
Page
Appendix VI – Security considerations from a historical perspective
VI.1 Historical origin and use of Recommendation ITU-T T.38
VI.2 Application vs network/transport level security
Bibliography