1 Scope
2
Normative references
3
Definitions
4
Abbreviations
5
Introduction
6
Communication between gateways
6.1 Internet protocol – TCP or UDP
6.2 Gateway facsimile data transfer functions
6.2.1
Treatment of non-standard facilities requests
7
IFT protocol definition and procedures
7.1 General
7.1.1 Bit and octet transmission order
7.1.2 Mapping of the T.30 bit stream
7.1.3 IFP Packet Layers for TCP/IP and UDP/IP
7.2 IFP packet format
7.2.1 T.38 packet
7.2.2 TYPE
7.2.3 DATA-Field
7.3 TYPE definitions
7.3.1
T30_INDICATOR
7.3.2 T30_DATA TYPE
7.4 The IFP DATA element
8
IFP message flow
8.1 Data rate management method 1
8.2 Data rate management method 2
9
IFT over UDP transport: IFT/UDP
9.1 Overview of UDPTL protocol
9.2 UDPTL header section format
9.2.1 UDPTL sequence number element
9.3 UDPTL payload section format
9.3.1 UDPTL FEC message format
9.4 IFP/UDP facsimile data transfer functions
9.4.1 Use of redundancy messages
Annex A – ASN.1 notation
A.1 ASN.1 notation
Annex B – Call establishment procedures
B.1 Communication between facsimile terminal and gateway
B.2 Transfer of addressing information
B.2.1 From calling terminal to gateway
B.2.2 Communication between gateways
Annex C – The optional forward error correction scheme for UDP
C.1 Overview of the optional forward error correction mechanism
C.1.1 Parity encode/decode scheme operation and
characteristics
C.1.2 Generating and transmitting FEC messages
C.1.3 Receiving FEC messages and primary
reconstruction
Appendix I – Session examples
I.1 Session examples
I.1.1 Two traditional facsimile devices
communicating using ECM
I.1.2 Traditional facsimile device and
Internet-aware facsimile device
I.1.2 Two traditional facsimile devices using
frequent frames