Maintenance-Object Repair Procedures
555-233-143
8-1162
Issue 1 May 2002
Figure 8-67.
ISDN-PRI Outgoing Test Call
Looped-back data
stream pattern is
generated by digital
port 1 and checked
by digital port 2 on
the TN771
Digital
Port 1
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TN771
Maintenance/Test
SPE
UN332
MSSNET
TN1655
PKT-INT
TDM
Bus
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Control
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Loop-back
Circuitry
Far-End
Equipment
B-channel carries
looped-back test signal
D-Channel instructs
far end to connect
loop-back circuitry
across B-channel
signal
External DS1 Facility
PBX Equipment
TN464
DS1
Interface
Packet
Bus
Digital
Port 2
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 ...