Testing
5-11
7110-A2-GB20-00
June 1997
Send V.54 Up/Down Sequences
The local DSU/CSU can send an ITU-T V.54 Up or Down sequence to request
the start or stop of a Data Channel Loopback on a remote DSU/CSU.
The DSU/CSU can send:
H
In-band V.54 Up (activation) code to request the start of a Data Channel
Loopback (V.54 Loop 2) at the remote DSU/CSUs or
H
In-band V.54 Down (deactivation) code to request termination of a Remote
Data Channel Loopback (V.54 Loop 2) at the remote DSU/CSU.
"
Procedure
To send an V.54 Up or Down sequence to a remote unit:
1. Position the cursor at the Up or Down selection next to Send V.54 Loopback
on the Data Port Tests screen.
2. Press the space bar to select the desired code (Up or Down).
3. Position the cursor at the Start command next to Send V.54 Loopback on the
Sync Data Port Tests screen.
4. Press Enter.
5. The Start command is changed to Sending. The Up or Down sequence
transmission stops automatically after 10 seconds. You cannot stop the
sequence manually.
The Send V.54 Up/Down test cannot be started when any loopback or Send
Pattern test is active on the network interface.
