Maintenance Architecture
555-233-143
1-16
Issue 1 May 2002
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Data cannot be carried over analog facilities unless inside the system it is
represented as a PCM-encoded analog signal. To do this for data
originating at a digital terminal, the signal enters the system at a digital port
and exits the system at a digital port. The signal then reenters the system
through a modem-pool connection (data-module to modem to analog-port)
and exits the system again at an analog port.
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Although DS1 is commonly called a trunk speed, here it names the protocol
used at layer 1 for digital trunks. Some trunks use different signaling
methods but use DS1 protocol at layer 1 (for example, PRI and
24th-channel signaling trunks).
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 ...