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Diagnostics Overview
This chapter provides detailed information on diagnostic tests on the SC 800 T3 DSU can be
initiated by the network manager via an SNMP controller, by the DTE via the HSSI port, or by the
network. Basic procedure for any diagnostic test is provided in Chapter 3.
Before You Begin
You should test the equipment when it is first installed to verify correct installation. After the
equipment is in service, use the diagnostic tests to diagnose any problems that occur in the operation
of the DSU or the data communications system. Applicable diagnostic tests are timed. The front
panel TM LED will illuminate for all tests.
Table 4-1
lists each diagnostic test and how it can be initiated. Detailed information for each test,
including data path diagrams are provided after the table.
Table 4-1
SC 800 T3 Diagnostic Tests
SC 800 T3 DSU Diagnostic Tests
Local Loopback Test
Local Loopback w/ Self Test
Payload Loopback
Line Loopback
End-to-End w/ Self Test
Remote Line Loopback
Remote Line Loopback w/Self Test
Remote Payload Loopback
Remote Payload Loop w/Self Test
DTE Loopback Test
Note
The Remote Payload Loopback and the Remote Payload Loopback with Self Test are for C-Bit framing only.
Note
For information on initiating tests through GDC TEAM software, refer to the TEAM 800 T3 Manual.
076R160-000
Issue 4
Chapter 4:
Master or Remote
Master only
Master only
Master only
Master only
Master only
Master only
SpectraComm 800 T3 Data Service Unit
Installation and Operation Manual
Diagnostics
Initiated via:
DTE Loop
A/B Lead
Either
Either
Either
Either
SNMP
Terminal
Control
Interface
4-1
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