1
Scope
2 References
3 Definitions and abbreviations
3.1 Definitions
3.2 Abbreviations
4 Reference models
4.1 System reference model
4.2 ATU reference model
5 Transport capacity
6
ATU interfaces
6.1 ATU interface for ATM transport
6.2 ATU PMD to TC logical interface
7 ATU functional characteristics
7.1 ATM transport protocol specific
functionalities
7.1.1 Payload transfer delay
7.1.2 ATM cell specific functionality
7.1.3 Framing structure for ATM transport
7.2 Network Timing Reference
7.2.1 Optional NTR capability
7.2.2 Transport of the NTR
7.3 Framing
7.3.1 Relationship to G.992.1 framing
7.3.2 Bit ordering
7.3.3 Data framing and reference points
7.4 Scrambler
7.5 Reed-Solomon Forward Error
Correction
7.5.1 Reed-Solomon coding
7.5.2 Reed-Solomon Forward Error Correction superframe synchronization
7.6 Interleaver
7.7 Tone ordering
7.8
Constellation encoder
7.8.1 Bit extraction
7.8.2 Constellation encoder
7.9 Gain scaling
7.10 Modulation
7.10.1 Subcarriers
7.10.2 Modulation by the inverse discrete Fourier transform (IDFT)
7.10.3 Synchronization symbol
7.10.4 Upstream data pattern
7.10.5 Downstream data pattern
7.11 Cyclic prefix
7.12 Transmitter dynamic range
7.12.1 Maximum clipping rate
7.12.2 Noise/Distortion floor
7.12.3 Transmitter spectral masks
8 Embedded Operations Channel (eoc)
8.1 eoc introduction
8.1.1 eoc messages overview
8.1.2 eoc protocol overview
8.2 eoc message encoding
8.2.1 ADDRESS field (# 1)
8.2.2 Data or opcode field (# 2)
8.2.3 BYTE PARITY field (# 3)
8.2.4 AUTONOMOUS MESSAGE field (# 4)
8.2.5 INFORMATION field (# 5)
8.3 eoc message description
8.3.1 Latching bidirectional eoc messages
8.3.2 End of Data message (EOD)
8.3.3 Dying Gasp message (DGASP)
8.3.4 Autonomous messages
8.3.5 Data registers in the ATU‑R
8.4 eoc protocol
8.4.1 Outstanding eoc messages
8.4.2 eoc state transitions
8.5 Clear eoc
9 ADSL overhead channel
9.1 The ADSL Overhead Control (aoc)
channel introduction
9.1.1 Bit swap channel
9.1.2 Superframe counting
9.2 aoc message encoding
9.2.1 aoc message header encoding
9.2.2 Profile Management Request
9.2.3 Profile Management Acknowledge
9.2.4 Bit swap request message encoding
9.2.5 Extended bit swap request message encoding
9.2.6 Bit swap acknowledge message encoding
9.3 Bit swap operation
9.3.1 Bit swap – Receiver
9.3.2 Bit swap – Transmitter
9.4 aoc protocol
10 In-service performance monitoring and surveillance
10.1 ADSL line related primitives
10.1.1 ADSL line related near-end anomalies
10.1.2 ADSL line related far‑end anomalies
10.1.3 ADSL line related near‑end defects
10.1.4 ADSL line related far-end defects
10.2 ATM data path related primitives
10.2.1 ATM data path related near‑end
anomalies
10.2.2 ATM data path related far‑end anomalies
10.2.3 ATM data path related near‑end defects
10.2.4 ATM data path related far‑end defects
10.3 Other ADSL indicators, parameters
and signals
10.3.1 Other near‑end primitives
10.3.2 Other far‑end primitives
10.3.3 Failure count parameters
10.4 Test parameters
10.4.1 Near‑end test parameters
10.4.2 Far‑end test parameters
10.5 Other failures and parameters
11 Initialization
11.1 Overview
11.1.1 Basic functions of initialization
11.1.2 Transparency to methods of separating upstream and downstream signals
11.1.3 Initialization Reset Procedure
11.2 Handshake – ATU‑C
11.3 Handshake – ATU‑R
11.4 Handshake power levels
11.5 Escape from Handshake to Fast
Retrain
11.5.1 C‑QUIET-EF1
11.5.2 R‑QUIET-EF1
11.6 Power levels in Transceiver
Training, Channel Analysis and Exchange
11.7 Transceiver training – ATU‑C
11.7.1 C‑QUIET2
11.7.2 C‑PILOT1
11.7.3 C‑PILOT1A
11.7.4 C‑QUIET3A
11.7.5 C‑REVERB1
11.7.6 C‑PILOT2
11.7.7 C‑ECT
11.7.8 C‑REVERB2
11.7.9 C‑QUIET5
11.7.10 C‑PILOT3
11.7.11 C‑REVERB3
11.8 Transceiver training – ATU‑R
11.8.1 R‑QUIET2
11.8.2 R‑REVERB1
11.8.3 R‑QUIET3
11.8.4 R‑ECT
11.8.5 R‑REVERB2
11.9 Channel analysis (ATU‑C)
11.9.1 C‑SEGUE1
11.9.2 C‑RATES1
11.9.3 C‑CRC1
11.9.4 C-MSG1
11.9.5 C‑CRC2
11.9.6 C‑MEDLEY
11.10 Channel analysis (ATU‑R)
11.10.1 R-SEGUE1
11.10.2 R‑REVERB3
11.10.3 R‑SEGUE2
11.10.4 R‑RATES1
11.10.5 R‑CRC1
11.10.6 R-MSG1
11.10.7 R‑CRC2
11.10.8 R‑MEDLEY
11.10.9 R‑REVERB4
11.11 Exchange – ATU‑C
11.11.1 C‑REVERB4
11.11.2 C‑SEGUE2
11.11.3 C-RATES-RA
11.11.4 C-CRC-RA1
11.11.5 C-MSG-RA
11.11.6 C-CRC-RA2
11.11.7 C-REVERB-RA
11.11.8 C-SEGUE-RA
11.11.9 C-MSG2
11.11.10 C‑CRC3
11.11.11 C‑RATES2
11.11.12 C‑CRC4
11.11.13 C‑B&G
11.11.14 C‑CRC5
11.11.15 C‑REVERB5
11.11.16 C‑SEGUE3
11.12 Exchange – ATU‑R
11.12.1 R‑SEGUE3
11.12.2 R-MSG-RA
11.12.3 R-CRC-RA1
11.12.4 R-RATES-RA
11.12.5 R-CRC-RA2
11.12.6 R-REVERB-RA
11.12.7 R-SEGUE-RA
11.12.8 R-MSG2
11.12.9 R‑CRC3
11.12.10 R‑RATES2
11.12.11 R‑CRC4
11.12.12 R‑REVERB5
11.12.13 R‑SEGUE4
11.12.14 R‑B&G
11.12.15 R‑CRC5
11.12.16 R‑REVERB6
11.12.17 R‑SEGUE5
11.13 Details of initialization timing
12 Fast Retrain
12.1 Fast Retrain overview
12.1.1 Profile requirements
12.2 Definition of Fast Retrain signals
12.2.1 Fast Retrain Signal power levels
12.3 Fast Retrain Procedure
12.3.1 ATU‑C initiated from SHOWTIME
12.3.2 ATU‑R initiated from SHOWTIME
12.3.3 Channel measurement
12.3.4 Selection of Tx power levels
12.3.5 Transceiver retraining
12.3.6 Profile exchange
12.4 Fast Retrain Procedure – Unknown
Profile Transition
12.5 Fast Retrain Procedure – Initiated
from L3 or Recommendation G.994.1
12.6 Abort of Fast Retrain
12.6.1 Abort of an ATU‑C initiated Fast Retrain Request
12.6.2 Abort of an ATU‑R initiated Fast Retrain Request
12.7 Fast Retrain Truncate
12.8 Fast Retrain Reset Procedure
13 Power management
13.1 Introduction
13.2 ADSL link states
13.3 Link state transitions
13.4 Link transition procedures
13.4.1 Transitions from L0 to L0 (T0a, T0b, T0c)
13.4.2 Transition from L0 to L1 (T0d)
13.4.3 Transitions from L1 to L0 (T1a, T1b, T1c, T1d)
13.4.4 Transitions from L0 or L1 to L3 (T0e, T0f, T1e, T1f)
13.4.5 Transitions from L3 to L0 (T3a, T3b)
13.5 eoc Handshake
13.5.1 ATU‑R initiated eoc Handshake
13.5.2 ATU‑C initiated eoc Handshake
Annex A – Non-overlapped spectrum operation
A.1 ATU‑R transmitter PSD mask
A.1.1 Passband PSD ripple and group delay
A.1.2 Transmit power spectral density and aggregate power level
A.2 ATU‑C transmitter PSD mask
A.2.1 Passband PSD ripple and group delay
A.2.2 Transmit power spectral density and aggregate power level
Annex B – Overlapped spectrum operation
B.1 ATU-R transmitter PSD mask
B.1.1 Passband PSD ripple and group delay
B.1.2 Transmit power spectral density and aggregate power level
B.2 ATU‑C transmitter PSD mask
B.2.1 Passband PSD ripple and group delay
B.2.2 Transmit power spectral density and aggregate power level
Annex C – ADSL above POTS co-existing in the same
binder as TCM-ISDN DSL
C.1 Scope
C.2 Definitions and abbreviations
C.2.1 Definitions
C.2.2 Abbreviations
C.3 Reference models
C.3.1 ATU‑C transmitter reference model (replaces figure in 4.2)
C.3.2 ATU‑R transmitter reference model (replaces figure in 4.2)
C.3.3 ATU transmitter timing model (new)
C.4 ATU interfaces
C.4.1 ATM interface for ATM transport (replaces figure in 6.1)
C.5 ATU functional characteristics
(pertains to clause 7)
C.5.1 Payload transfer delay (supplements 7.1.1)
C.5.2 Framing (pertains to 7.3)
C.5.3 Modulation (pertains to 7.10)
C.5.4 Transmitter spectral mask (replaces 7.12.3)
C.5.5 Dual Bitmap (new)
C.5.6 Rate Converter (new)
C.5.7 FEXT Bitmap (new)
C.6 aoc on-line adaptation and
reconfiguration (pertains to clause 9)
C.6.1 Bit swap request message encoding (replaces 9.2.4)
C.6.2 Extended bit swap request message encoding (supplements 9.2.5)
C.6.3 Bit swap acknowledge message encoding (supplements 9.2.6)
C.7 In-service performance monitoring
and surveillance (pertains to clause 10)
C.7.1 ADSL line related primitives (pertains to 10.1)
C.7.2 Test parameters (supplements 10.4)
C.8 Initialization
C.8.1 Initialization with Hyperframe (new)
C.8.2 Escape from Handshake to Fast Retrain (replaces 11.5)
C.8.3 Transceiver training – ATU‑C (supplements 11.7)
C.8.4 Transceiver training – ATU‑R (supplements 11.8)
C.8.5 Channel analysis (ATU‑C)
(supplements 11.9)
C.8.6 Channel analysis (ATU‑R) (supplements 11.10)
C.8.7 Exchange – ATU‑C (supplements
11.11)
C.8.8 Exchange – ATU‑R (supplements 11.12)
C.9 Fast retraining (supplements
clause 12)
C.9.1 Fast Retrain overview (pertains to 12.1)
C.9.2 Definition of Fast Retrain signals (supplements 12.2)
C.9.3 Fast Retrain procedure
(supplements 12.3)
C.9.4 Initiated from L3 or Recommendation G.994.1 (replaces 12.5)
C.10 Power management (pertains to
clause 13)
C.10.1 Transition from L0 to L1 (T0d) (pertains to 13.4.2)
Annex D – System performance for North America
D.1 System performance for North
America
D.1.1 Required test cases
D.1.2 Extended reach cases
Annex E – System performance for Europe
E.1 System performance for Europe
Appendix I
Appendix II – Guide to scenarios for the implementation
of the various procedures in Recommendations G.994.1 and G.992.2
Appendix III – Compatibility with other Customer
Premises Equipment