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Remote Loopback Test
This test requires compatible AT&T equipment at the remote end.
The remote loopback test ensures no problems with data transmission are occurring in the data
transfer circuit. When you initiate a remote loopback test, data is transmitted from the data
terminal, through your ADM and the network to the data module at the far-end, where it is
looped back to your ADM. A data call must be established before you initiate a remote
loopback test.
To initiate a remote loopback test:
Establish a data call.
1
Rapidly type the Attention sequence (default value is +++).
2
At the CMD: prompt, type test remote on your data terminal. The ADM displays:
3
REMOTE LOOPBACK TEST
ENTER ATTENTION SEQUENCE TO END TEST
Or, if you are not on a data call, the ADM displays:
Test Remote cannot be used at this time
Type characters on your terminal keyboard and check to see that they are being echoed
4
as typed.
If you find no errors, the ADM passed the test.
Rapidly type the Attention sequence (default value is +++) to end the test. Ending the test
5
does not end the call. You will return to local mode, and the ADM will be ready to transmit
data. The ADM displays:
Call Status:
Type H for help.
At the CMD: prompt, type continue to return to Data Mode.
6
Local DTE
Characters
Sent
Characters
Received
5-2
Testing
Data Call Active
ADM
S
Transmitter
w
i
t
Receiver
c
h
FIGURE 5-2
Remote Loopback Test
Remote Data Endpoint
Transmitter
Receiver
Remote
DTE
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