Avaya S8700 Maintenance Manual page 168

Alarms, Errors, and Troubleshooting
If stand-alone mode is entered successfully, the following is displayed on the
connected terminal:
Command:
NOTE:
If the previous display does not appear, check the wiring between the
terminal and the TN771D, and the terminal parameters settings. If these are
correct, the TN771D may be defective. In such a case, use the following
procedures to exit stand-alone mode, and then test the Maintenance/Test
circuit pack. Refer to
8-1157
8-1175. If the TN771D fails while in stand-alone mode, the message TN771
circuit pack failed is displayed, and no further input is accepted on
the terminal. The circuit pack must be replaced.
To exit stand-alone mode:
1. Remove the 258A adapter from the Amphenol connector.
2. If the TN771D was installed for this procedure, remove it. Otherwise,
reseat the TN771D.
3. If change system-parameters maintenance was used to disable alarm
origination, re-enable it now.
Using Stand-Alone Mode in Packet-Bus Fault
Isolation and Correction
When the TN771D is in stand-alone mode, three commands are available:
ds
dsa
?
4-94 Issue 1 May 2002
TN771 STAND-ALONE MODE
(Type "?" at the prompt for help)
''M/T-BD (Maintenance/Test Circuit Pack)'' on page
and ''M/T-PKT (Maintenance/Test Packet Bus Port)'' on page
Displays the current state of the packet bus leads.
Toggles auto-report mode on and off. In auto-report mode, the state of the
packet bus leads are displayed and the terminal beeps whenever a
change occurs.
Displays the available commands.
555-233-143