Table of Contents
Advertisement
Tests
T1 Tests
When the optional Cascade Port interface is installed you have the choice of running T1 and DS0
diagnostics through either the Network interface or the Cascade interface. Channel diagnostics
employ whichever T1 interface the channel data is routed through by the Channel Configuration.
T1 Self Test (End-to-End)
T1 Self Test turns on the T1-level test pattern generator and checker in the DSU. The test can be
initiated from the terminal interface or by SNMP control. Use of this test requires coordination with
the remote site, either to establish a loopback or to activate a test pattern generator and checker
(using the same pattern) for an end-to-end test.
The illustrations show Self Test in use as an End-to-End Test. When coordinating this test with a
remote site, make sure that the same test pattern is selected in both units.
TPG
DTE
Inter-
face
TPC
TPG = Test Pattern Generator
TPC = Test Pattern Checker
Figure 4-3
TPC
Remote
Device
TPC
Figure 4-4
076R155-000
Issue 7
SC 553 DSU
TX
Driver
Framer
Network
Analog
Receiver
T1 End-to-End Self Test, Network Interface
Cascade Interface
Analog
Receiver
Framer
TX
Driver
DTE
Interface
T1 End-to-End Self Test, Cascade Interface
SpectraComm 553 Fractional T1 DSU
Installation and Operation Manual
Remote DSU
Analog
Receiver
Framer
TX
Driver
SC 553 DSU
TPC
Network Interface
TX
Driver
Framer
TPC
Analog
Receiver
TPG = Test Pattern Generator
TPC = Test Pattern Checker
T1 Tests
TPC
DTE
Inter-
face
TPG
4-5
Advertisement
Table of Contents
