1 Scope
2 References
3
Definitions
4
Abbreviations
5
Conventions
6
Reference model
7
Functional description
7.1 Transmitter functions
7.2 Receiver functions
8
Services provided
8.1 Audio service
8.2 Circuit mode data service
8.3 Frame mode data service
8.4 Dialled digits service
8.5 Channel associated signalling service
8.6 Facsimile demodulation/remodulation service
8.7 Alarms service
8.8 State control service
9
Means to achieve isochrony
9.1 Delay variation in user processing
9.2 Delay variation below the SSCS sublayer
10 Packet format types
10.1 Type 1 – Unprotected
10.2 Type 2 – Partially protected
10.3 Type 3 – Fully protected
11 Common facilities for type 3
packets
11.1 Relative event timing
11.2 Triple redundancy and refresh
12 UUI codepoint assignments
13 Encoding
format profiles
13.1 The function of a profile
13.2 Relationship of service data unit and sequence number interval
13.3 Examples of profile structure
13.4 Mandatory profile support
14 Sequence numbering
14.1 Basic principles
14.2 Embedding in UUI codepoints
14.3 Incrementing during silence
14.4 Change of sequence number interval
15 Circuit mode data
16 Frame mode data
17 Facsimile
demodulation/remodulation
17.1 Functional requirements
17.2 Two methods of analysis
17.2.1 Protocol analysis
17.2.2 Waveform analysis
17.3 Optional support of non-standard facilities
17.4 Transparency for T.30 data
17.5 Timing requirements
17.6 Starting and stopping facsimile demodulation
17.7 Facsimile demodulation packets
18 SSCS parameters of operation
Annex A – Specification of audio encoding formats
Annex B – Encoding format for audio algorithm G.711
B.1 General
B.2 Encoding data unit
Annex C – Encoding format for audio algorithm G.722
C.1 General
C.2 Encoding data unit
Annex D – Encoding format for audio algorithm G.723.1
D.1 General
D.2 Encoding data unit
D.3 Silence
insertion descriptor
Annex E – Encoding format for audio algorithm G.726
E.1 General
E.2 Encoding data unit
Annex F – Encoding format for audio algorithm G.727
F.1 General
F.2 Encoding data unit
Annex G – Encoding format for audio algorithm G.728
G.1 General
G.2 Encoding data unit
Annex H – Encoding format for audio algorithm G.729
H.1 General
H.2 Encoding data unit
H.3 Silence
insertion descriptor
H.4 G.729-6.4 encoding data unit
H.5 G.729-12 encoding data unit
Annex I – Encoding format for generic silence insertion descriptor
I.1 General
I.2 Packet format
I.3 Procedures
Annex J – Encoding format for circuit mode data at N*64 kbit/s
J.1 Packet format
Annex K – Packet format and procedures for dialled digits
K.1 General
K.2 Packet format
K.3 Transmitter procedures
K.4 Receiver procedures
Annex L – Packet format and procedures for channel associated signalling bits
L.1 General
L.2 Packet format
L.3 Transmitter procedures
L.4 Receiver procedures
Annex M – Packet format and procedures for facsimile demodulation
M.1 Facsimile demodulation control concepts
M.1.1 Message types
M.1.2 Modulation
control messages
M.1.3 T.30 Data
M.1.4 Common facilities
M.1.5 Time stamps
M.1.6 Sequence numbers
M.1.7 Robustness against packet loss
M.2 Facsimile demodulation control packets
M.2.1 T.30_Preamble
M.2.2 EPT
M.2.3 Training
M.2.4 Fax_Idle
M.2.5 T.30_Data
M.3 Facsimile image data packets
Annex N – Packet format and procedures for OAM (alarms)
N.1 General
N.2 Packet format
N.3 Procedures
Annex O – Packet format and procedures for user state control
O.1 General
O.2 Packet format
O.3 Procedures
Annex P – Predefined encoding format profiles
Appendix I – AAL Type 1 interworking between N-ISDN and B-ISDN
I.3 Informative references
Appendix II – Simple derivation of the modulus for sequence numbering
II.1 Packet flow timing notation and relationships
II.2 Simple derivation of the modulus
Appendix III – Example facsimile demodulation scenarios
III.1 Typical facsimile demodulation scenario – Normal completion
III.2 Fallback to voiceband data – NSS not supported
III.3 Fallback to voiceband data – demodulation failure
Appendix IV – Example
facsimile demodulation V.17 training
Appendix V – Protocol implementation conformance statement
(PICS) proforma
V.1 Introduction
V.1.1 Scope
V.1.2 Normative references
V.1.3
Abbreviations
V.1.4 Conformance statement
V.2 PICS proforma
V.2.1 Identification of the
PICS proforma corrigenda
V.2.2 Instructions for
completing the PICS proforma
V.2.3 Identification of the
implementation
V.2.4 Global statement of
conformance