Fault Isolation Procedure - General DataComm DeskTop T1 Installation And Operation Instruction Manual

Diagnostics
Local DSU Problem
Local Equipment or
Equipment-to-DSU
Connection Problem
Communication Line or
Line-to-DSU Connection
Problem
Remote DSU or Equipment
Problem
Remote DSU Problem
Remote Equipment or
Equipment-to-DSU
Connection Problem
Figure 4-1 Fault Isolation Procedure
Start
Perform Network Local
Test with
QRSS Self Test
Pass
Fail Pass
or Perform Network Local Test
Fail
Perform Network Remote
Pass
Fail
Pass
Test, or Network Remote
or
Test with Self Test, with
Fail
remote configured for Line
Perform Network Remote
Pass
Fail
Pass
Test, or Network Remote Test
or
with Self Test, with remote
Fail
configured for Payload
Perform Network Local
Pass
Fail
Pass
Test with QRSS Self Test
or
Fail
Pass
Fail
Pass
Perform Network Local
or
Test at remote DSU
Fail
Fail Pass Pass
No System Problem
or
Fail
4-3
Loopback
Loopback
at remote DSU
GDC 048R154-000