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Diagnostics Menu
The Diagnostics menu enables you to run (and end) any of four different
loopback tests, return to the previous menu, or exit (quit) the command
mode.
Diagnostics
Enter Selection (-(previous), q(uit), <1>):
Local Loop Back
The Local Loop Back option (option 1) enables you to test the interface
to the DTE device connected to the Data port of the MultiDSU. For this
test, the local MultiDSU is put into loopback mode and any data coming
into the MultiDSU from the DTE device is immediately looped back to
the DTE device. See Figure 5-1. Use this test to verify that the Data port
cable and its connections are OK, and that the MultiDSU's Data port
settings are correct.
Local
Loopback
Mux
Remote Loop Back
The Remote Loopback test (option 2 on the Diagnostics menu) checks
the integrity of all the cables and connections between the local
MultiDSU and the remote MultiDSU (at the other end of the T1 line) as
well as checking the local MultiDSU's T1 Line transmit and receive
circuitry. For this test, the local MultiDSU is put into loopback mode and
any data coming into its T1 Line port is immediately looped back over
the T1 line to the remote MultiDSU. See Figure 5-2.
1. Local Loop Back
2. Remote Loop Back
3. Processor Loop Back
4. Put Remote Into Loop Back
5. Take Remote Out of Loop Back
6. End Loop Back
MultiDSU
Figure 5-1. Local Loopback Test
T1 Line
_
Mux
Remote
MultiDSU
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