Remote Loopback Test - Avaya 6424D+M User Manual

Chapter 6: Test Descriptions
Page 6-4
REMOTE LOOPBACK TEST This test can be initiated by the front panel interface or the RL lead
Local DTE
Data Sent
Data Received
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.
High Speed Link
Transmitter
Receiver
FIGURE 6-4

Remote Loopback Test

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.
DEFINITY
Remote
Data Endpoint
S
Receiver
W
I
T
Transmitter
C
H
Communications System
DEFINITY High Speed Link
User´s Guide
Remote
DTE