ITU-T G.992.5 (01/2009)

VOLUME 1: CORE RECOMMENDATION
1 Scope
2 References
3 Definitions
4 Abbreviations and acronyms
5 Reference models
6 Transport protocol‑specific transmission convergence (TPS‑TC) function
6.1 Transport capabilities
7 Physical media‑specific transmission convergence (PMS‑TC) function
7.1 Transport capabilities
7.2 Additional functions
7.3 Block interface signals and primitives
7.4 Block diagram and internal reference point signals
7.5 Control parameters
7.6 Frame structure
7.7 Data plane procedures
7.8 Control plane procedures
7.9 Management plane procedures
7.10 Initialization procedures
7.11 On‑line reconfiguration
7.12 Power management mode
8 Physical media-dependent function
8.1 Transport capabilities
8.2 Additional functions
8.3 Block interface signals and primitives
8.4 Block diagram and internal reference point signals
8.5 Control parameters
8.6 Constellation encoder for data symbols
8.7 Constellation encoder for synchronization and L2 exit symbols
8.8 Modulation
8.9 Transmitter dynamic range
8.10 Transmitter spectral masks
8.11 Control plane procedures
8.12 Management plane procedures
8.13 Initialization procedures
8.14 Short initialization procedures
8.15 Loop diagnostics mode procedures
8.16 On‑line reconfiguration of the PMD function
8.17 Power management in the PMD function
9 Management protocol‑specific transmission convergence (MPS‑TC) functions
9.1 Transport functions
9.2 Additional functions
9.3 Block interface signals and primitives
9.4 Management plane procedures
10 Dynamic behaviour
Annex A – Specific requirements for an ADSL system operating in the frequency band above POTS
A.1 ATU‑C functional characteristics (pertains to clause 8)
A.2 ATU‑R functional characteristics (pertains to clause 8)
A.3 Initialization
A.4 Electrical characteristics
Annex B – Specific requirements for an ADSL system operating in the frequency band above ISDN as defined in Appendices I and II of Recommendation ITU‑T G.961
B.1 ATU‑C functional characteristics (pertains to clause 8)
B.2 ATU‑R functional characteristics (pertains to clause 8)
B.3 Initialization
B.4 Electrical characteristics
Annex C – Specific requirements for an ADSL system operating in the same cable as ISDN as defined in Appendix III of Recommendation ITU‑T G.961
Annex D – ATU‑C and ATU‑R state diagrams
Annex E – POTS and ISDN basic access splitters
Annex F – ATU‑x performance requirements for region A (North America)
F.1 Performance requirements for operation of ADSL over POTS (Annex A)
F.2 Performance requirements for operation of all‑digital mode ADSL (Annex I)
Annex G – ATU‑x performance requirements for region B (Europe)
G.1 Performance requirements for operation of ADSL over POTS (Annex A)
G.2 Performance requirements for operation of ADSL over ISDN (Annex B)
G.3 Performance requirements for operation of all‑digital mode ADSL (Annex I)
G.4 Performance requirements for operation of all‑digital mode ADSL (Annex J)
Annex H – Specific requirements for a synchronized symmetrical DSL (SSDSL) system operating in the same cable binder as ISDN as defined in Appendix III of Recommendation ITU‑T G.961
Annex I – All‑digital mode ADSL with improved spectral compatibility with ADSL over POTS
I.1 ATU‑C functional characteristics (pertains to clause 8)
I.2 ATU‑R functional characteristics (pertains to clause 8)
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I.3 Initialization
I.4 Electrical characteristics
Annex J – All‑digital mode ADSL with improved spectral compatibility with ADSL over ISDN
J.1 ATU‑C functional characteristics (pertains to clause 8)
J.2 ATU‑R functional characteristics (pertains to clause 8)
J.3 Initialization
J.4 Electrical characteristics
Annex K – TPS‑TC functional descriptions
Annex L – This annex is intentionally left blank
Annex M – Specific requirements for an ADSL system with extended upstream bandwidth, operating in the frequency band above POTS
M.1 ATU‑C functional characteristics (pertains to clause 8)
M.2 ATU‑R functional characteristics (pertains to clause 8)
M.3 Initialization
M.4 Electrical characteristics
Annex N – This annex is intentionally left blank
Annex O – This annex is intentionally left blank 89
Annex P – Reduced downstream aggregate transmit power requirements
Appendix I – ATM layer to physical layer logical interface
Appendix II – Compatibility with other customer premises equipment
Appendix III – The impact of primary protection devices on line balance
Appendix IV – PSD template to be used in capacity calculations with in-band transmit spectrum shaping
Appendix V – Constraints on delay, impulse noise protection, overhead rate, and net data rate when bonding
Appendix VI – Packet layer to physical layer logical interface
Appendix VII – ADSL2plus automoding
Appendix VIII – Impact of loop and ATU impedance mismatch on the Hlog accuracy
Bibliography
VOLUME 2 – ANNEX C
C.1 Scope
C.2 References
C.3 Definitions
C.4 Abbreviations and acronyms
C.5 Reference models
C.6 Transport protocol‑specific transmission convergence (TPS‑TC) function
C.7 Physical media‑specific transmission convergence (PMS‑TC) function
C.7.1 Transport capabilities
C.7.2 Additional functions
C.7.3 Block interface signals and primitives
C.7.4 Block diagram and internal reference point signals
C.7.5 Control parameters
C.7.6 Frame structure
C.7.7 Data plane procedures
C.7.8 Control plane procedures
C.7.9 Management plane procedures
C.7.10 Initialization procedures
C.7.11 On‑line reconfiguration
C.7.12 Power management mode
C.8 Physical media-dependent function
C.8.1 Transport capabilities
C.8.2 Additional functions
C.8.3 Block interface signals and primitives
C.8.4 Block diagram and internal reference point signals
C.8.5 Control parameters
…
C.8.6 Constellation encoder for data symbols
C.8.7 Constellation encoder for synchronization and L2 exit symbols
C.8.8 Modulation
C.8.9 Transmitter dynamic range
C.8.10 Transmitter spectral masks
C.8.11 Control plane procedures
C.8.12 Management plane procedures
C.8.13 Initialization procedures
C.8.14 Short initialization procedures
C.8.15 Loop diagnostics mode procedures
C.8.16 On‑line reconfiguration of the PMD function
C.8.17 Power management in the PMD function
C.9 Management protocol‑specific transmission convergence (MPS‑TC) functions
C.9.1 Transport functions
C.9.2 Additional functions
C.9.3 Block interface signals and primitives
C.9.4 Management plane procedures
C.10 Dynamic behaviour
Sub-annex C.Aa – Specific requirements for an Annex C-based ADSL system operating with a downstream bandwidth of 2208 kHz and an upstream bandwidth of 138 kHz
C.Aa.1 ATU‑C functional characteristics (pertains to clause C.8)
C.Aa.2 ATU‑R functional characteristics (pertains to Clause C.8)
C.Aa.3 Initialization
Sub-annex C.Ab – Specific requirements for an Annex C-based ADSL system operating with a downstream bandwidth of 2208 kHz and an upstream bandwidth of 276 kHz
C.Ab.1 ATU‑C functional characteristics (pertains to clause C.8)
C.Ab.2 ATU‑R functional characteristics (pertains to clause C.8)
C.Ab.3 Initialization
Annex C.K – TPS‑TC functional descriptions specific to an Annex C-based system
Appendix C.IV – Example overlapped PSD masks for use in a TCM‑ISDN crosstalk environment

Recommendation ITU‑TG.992.5 describes asymmetrical digital subscriber line (ADSL) transceivers on a metallic twisted pair that allows high‑speed data transmission between the network operator end (ATU‑C) and the customer end (ATU‑R), using extended bandwidth.