1
Scope
2 References
2.1 Normative references
2.2 Bibliography
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
8.9 Rate control service
8.10 Change SSCS operation service
8.11 Loopback 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 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
and loopback)
N.1 General
N.2 Packet format
N.2.1 Alarm Packet format
N.2.2 Loopback Packet format
N.3 Procedures
N.3.1 Alarm procedures
N.3.2 Loopback 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
Annex Q Encoding format for audio algorithm AMR
Q.1 General
Q.2 Encoding Data Unit
Q.3 Silence Descriptor
Annex R Packet formats and procedures for rate
control
R.1 General
R.2 Packet format
R.3 Transmitter procedures
R.4 Receiver procedures
Annex S Packet formats and Procedures for
synchronization of change in SSCS operation
S.1 General
S.2 Packet format
S.3 Transmitter procedures
S.4 Receiver procedures
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
Appendix VI Use of this Recommendation for mobile
applications