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Advance Data Sheet
May 1998
T7633 Dual T1/E1 3.3 V Short-Haul Terminator
3
Lucent Technologies Inc.
Table of Contents
(continued)
Contents
Page
Frame Formats........................................................................................................................................................55
T1 Framing Structures ......................................................................................................................................55
T1 Loss of Frame Alignment (LFA)...................................................................................................................62
T1 Frame Recovery Alignment Algorithms .......................................................................................................63
T1 Robbed-Bit Signaling...................................................................................................................................64
CEPT 2.048 Basic Frame, CRC-4 Time Slot 0, and Signaling Time Slot 16 Multiframe Structures.................66
CEPT 2.048 Basic Frame Structure..................................................................................................................67
CEPT Loss of Basic Frame Alignment (LFA)....................................................................................................69
CEPT Loss of Frame Alignment Recovery Algorithm.......................................................................................69
CEPT Time Slot 0 CRC-4 Multiframe Structure................................................................................................70
CEPT Loss of CRC-4 Multiframe Alignment (LTS0MFA)..................................................................................71
CEPT Loss of CRC-4 Multiframe Alignment Recovery Algorithms...................................................................72
CEPT Time Slot 16 Multiframe Structure..........................................................................................................76
CEPT Loss of Time Slot 16 Multiframe Alignment (LTS16MFA) ......................................................................78
CEPT Loss of Time Slot 16 Multiframe Alignment Recovery Algorithm............................................................78
CEPT Time Slot 0 FAS/NOT FAS Control Bits .......................................................................................................79
FAS/NOT FAS Si- and E-Bit Source.................................................................................................................79
NOT FAS A-Bit (CEPT Remote Frame Alarm) Sources...................................................................................80
NOT FAS Sa-Bit Sources..................................................................................................................................80
Sa Facility Data Link Access.............................................................................................................................81
NOT FAS Sa Stack Source and Destination.....................................................................................................82
CEPT Time Slot 16 X0—X2 Control Bits ..........................................................................................................84
Signaling Access.....................................................................................................................................................85
Transparent Signaling.......................................................................................................................................85
DS1: Robbed-Bit Signaling ...............................................................................................................................85
CEPT: Time Slot 16 Signaling...........................................................................................................................86
Auxiliary Framer I/O Timing ....................................................................................................................................87
Alarms and Performance Monitoring.......................................................................................................................91
Interrupt Generation..........................................................................................................................................91
Alarm Definition.................................................................................................................................................91
Event Counters Definition .................................................................................................................................97
Loopback and Transmission Modes .................................................................................................................99
Line Test Patterns...........................................................................................................................................102
Automatic and On-Demand Commands.........................................................................................................106
Facility Data Link (FDL).........................................................................................................................................108
Receive Facility Data Link Interface................................................................................................................108
Transmit Facility Data Link Interface...............................................................................................................114
HDLC Operation..............................................................................................................................................115
Transparent Mode...........................................................................................................................................118
Diagnostic Modes............................................................................................................................................120
Phase-Lock Loop Circuit.......................................................................................................................................122
Framer-System (CHI) Interface.............................................................................................................................124
DS1 Modes .....................................................................................................................................................124
CEPT Modes...................................................................................................................................................124
Receive Elastic Store......................................................................................................................................124
Transmit Elastic Store.....................................................................................................................................124
Concentration Highway Interface (CHI) ................................................................................................................125
CHI Parameters ..............................................................................................................................................126
CHI Frame Timing...........................................................................................................................................129
CHI Offset Programming.................................................................................................................................132