DS1-BD (DS1 Interface Circuit Pack)
Issue 1 May 2002
8-587
555-233-143
Combined with a TN767E circuit pack, Avaya’s 120A1 Integrated CSU module
becomes an enhanced CSU. The 120A1 CSU, combined with new switch
software and the functionality provided by a TN767E’s hardware and firmware,
provides functionality equivalent to an external stand-alone Avaya ESF T1 CSU.
The 120A1 CSU connects to the TN767E circuit pack on the I/O connector panel
behind the port carrier, and thus becomes an integrated part of the S8700
Multi-Connect system. Throughout this document, the term 120A1 means a
120A1 (or later-suffixed) CSU.
The 120A1 CSU is for use in the United States of America with 1.544-Mbps DS1
service. For more information about the 120A1 CSU module see DEFINITY
Communications System Generic 1, Generic 2, and Generic 3 V1 and V2 —
Integrated CSU Module Installation and Operation, 555-230-193.
A TN767E and a 120A1 integrated CSU support on-demand loop-back tests
assisting fault detection between the:
■
TN767E circuit pack and the integrated CSU
■
Integrated CSU and an optional customer-premises loop-back jack
■
Integrated CSU and a remote CSU.
These loop-back tests are explained in detail later in this DS1-BD section, but
gives a high-level overview of the loop-back points.
The following list of acronym definitions are for
■
PLB = Payload Loopback
■
BLB = Board Loopback
■
ELB = Equipment Loopback
■
LLB = Line Loopback
■
RLB = Repeater Loopback
■
CLJ = Loop-Back Jack Loopback
■
R-LLB = Remote Line Loopback
■
SMRT = Smart Jack
■
LPBK = Loopback
For more information about DS1 interfaces, refer to the DEFINITY
Communications System DS1/CEPT1/ISDN-PRI Reference, 555-025-107.
Summary of Contents for S8700 Series
Page 50: ...Maintenance Architecture 555 233 143 1 26 Issue 1 May 2002 ...
Page 74: ...Initialization and Recovery 555 233 143 3 12 Issue 1 May 2002 ...
Page 186: ...Alarms Errors and Troubleshooting 555 233 143 4 112 Issue 1 May 2002 ...
Page 232: ...Additional Maintenance Procedures 555 233 143 5 46 Issue 1 May 2002 ...
Page 635: ...status psa Issue 1 May 2002 7 379 555 233 143 status psa See status tti on page 7 406 ...
Page 722: ...Maintenance Commands 555 233 143 7 466 Issue 1 May 2002 ...