Avaya 6211 Guia Do Utilizador

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This test can be initiated by the front panel interface or the RL lead
on the V.35 interface.

The remote loopback test is used to send data to a remote
endpoint and check the returned data for errors.  You must be on a
data call to run a remote loopback test.

The HSL supports two optional protocols for putting a remote
endpoint in the data loopback test mode —AT&T and V.54
protocol.  The protocol used must be the same as the protocol
used by the remote endpoint.  In addition to matching protocols,
the REQUEST TO SEND input lead on the V.35 interface must be
ON if your HSL is optioned for 56KBPS, HALF DUPLEX
operation, and the DATA INVERT option must be set to OFF if
your HSL is optioned for 64KBPS operation.

Local DTE

Data Sent

Data Received

Transmitter

Receiver

High Speed Link

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Transmitter

Receiver

Remote

Data Endpoint

Remote

DTE

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This test should be conducted when data errors are detected.
Passing this test indicates that the problem is most likely in the
remote DTE.  Since network problems can cause errors, the remote
loopback test should be run while on the call where errors were
detected.