1
Scope
2 References
3 Definitions
4 Abbreviations
5 System reference diagram
6 Signals and modulation
6.1 Description of signals
6.1.1 4.3125 kHz signalling family
6.1.2 4 kHz signalling family
6.2 Modulation
6.3 Transmit filter characteristics
6.3.1 4.3125 kHz signalling family
6.3.2 4 kHz signalling family
7 Description of messages
7.1 CL – Capabilities List
7.2 CLR – Capabilities List + Request
7.3 MR – Mode Request
7.4 MS – Mode Select
7.5 MP – Mode Proposal
7.6 ACK(1) – Acknowledge, Type 1
7.7 ACK(2) – Acknowledge, Type 2
7.8 NAK-EF – Negative Acknowledge,
Errored Frame
7.9 NAK-NR – Negative Acknowledge, Not
Ready
7.10 NAK-NS – Negative Acknowledge, Not
Supported
7.11 NAK-CD – Negative Acknowledge,
Clear Down
7.12 REQ-MS – Request MS Message
7.13 REQ-MR – Request MR Message
7.14 REQ-CLR – Request CLR Message
8 Structure of messages
8.1 Format convention
8.2 Frame structure
8.3 Frame check sequence field
8.4 Octet transparency
8.5 Inter-frame time fill
9
Message coding format
9.1 General
9.2 Coding format for parameters in
the I and S fields
9.2.1 Parameter classification
9.2.2 Order of transmission of parameters
9.2.3 Delimiting and parsing of parameter blocks
9.3 Identification field (I)
9.3.1 Message type
9.3.2 Version number
9.3.3 Vendor ID field
9.3.4 Parameter field
9.4 Standard information field (S)
9.5 Non-standard information field
(NS)
9.6 Overall message composition
10 G.994.1 transactions
10.1 Basic transactions
10.1.1 Transaction A
10.1.2 Transaction B
10.1.3 Transaction C
10.1.4 Transaction D
10.2 Extended transactions
10.2.1 Transaction A:B
10.2.2 Transaction B:A
10.2.3 Transaction A:C
10.2.4 Transaction B:C
10.2.5 Transaction D:C
10.3 Message segmentation
10.4 State transition diagrams
11 Start-up/cleardown procedures
11.1 Duplex start-up procedures
11.1.1 HSTU-R initiated start-up procedure
11.1.2 HSTU-C initiated start-up procedure
11.2 Half-duplex start-up procedures
11.2.1 HSTU-R initiated start-up procedure
11.2.2 HSTU-C initiated start-up procedure
11.3 Cleardown procedure
12 Error recovery procedures
Annex A – Support for
legacy non-G.994.1 devices
Annex B – Operation
over multiple wire pairs
Appendix I – G.994.1 sample sessions
Appendix
II – Provider code contact information
Appendix III –
Support for legacy DMT-based devices
Appendix IV –
Procedure for the assignment of additional G.994.1 parameters
IV.1 Introduction
IV.2 Procedure
Appendix V – Rules
for code point Table numbering
Appendix
VI – Bibliography