General DataComm SpectraComm 800 T3, Руководство по установке и эксплуатации

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Diagnostics Diagnostics Overview
076R160-000 SpectraComm 800 T3 Data Service Unit 4-5
Issue 4 Installation and Operation Manual
End-to-End Self Test
T3 End to End Self Test turns on the T3-level test pattern generator and checker in the DSU. 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.
In this test, the following conditions occur:
• Errors inserted are sent to the remote unit.
• Errors counted have been sent by the remote unit.
Note
A remote telnet can not be used to set a loopback at the remote.
Figure 4-5
End-to-End Self Test
Tx DRIVER
ANALOG
RECEIVER
T
3
N
E
T
W
O
R
K
F
R
A
M
E
R
DTE
INTERFACE
TEST
PATTERN
GENERATOR
MASTER SC800 T3 DSU
TEST
PATTERN
CHECKER
Tx DRIVER
ANALOG
RECEIVER
F
R
A
M
E
R
DTE
INTERFACE
TEST
PATTERN
CHECKER
REMOTE SC800 T3 DSU
TEST
PATTERN
GENERATOR