Avaya MCC1 Maintenance Procedures page 229

Entering and exiting stand-alone mode
While in stand-alone mode, the TN771D's red LED is lit. This is normal and serves as a reminder to
remove the TN771D from stand-alone mode.
CAUTION:
A TN771D in stand-alone mode must be the only TN771D in the PN. If one is already in
the PN, place it in stand-alone mode. Do not insert a second TN771D. Otherwise, the
system cannot detect the extra circuit pack and will behave unpredictably.
CAUTION:
Critical reliability only: if the TN771D packet bus port has reconfigured the packet bus, as
indicated by error type 2049 against PKT-BUS, placing the Maintenance/Test in stand-
alone mode causes a loss of service to the packet bus. In this case, this procedure disrupts
service.
For PNs with a TN771D already installed:
1 Ensure that alarm origination is suppressed either at login or by using the command change
system-parameters maintenance.
2 Attach the 258A 6-port male Amphenol adapter to the Amphenol connector behind the carrier
corresponding to the TN771D's slot. Connect one end of a D8W 8-wire modular cable to port 1 of
the 258A. Connect the other end of the cable to a 355A EIA-232 adapter. Plug the EIA-232
adapter into the terminal to be used, and turn the terminal on.
3 Reseat the TN771D circuit pack.
NOTE:
Critical reliability only: this causes a MINOR OFF-BOARD alarm to be raised against
PKT-BUS. This alarm is not resolved until the TN771D's packet bus port (M/T-PKT) is
returned to service. To ensure that PKT-BUS alarms have been cleared, it might be
necessary to restore the TN771D to normal mode.
For PNs without a TN771D installed:
1 Attach the 258A 6-port male Amphenol adapter to the Amphenol connector behind the carrier
corresponding to the slot where the TN771D is to be inserted. Connect one end of a D8W 8-wire
modular cable to port 1 of the 258A. Connect the other end of the cable to a 355A EIA-232
adapter. Plug the EIA-232 adapter into the terminal to be used, and turn the terminal on.
2 Insert the TN771D circuit pack into the slot. The system will not recognize the presence of the
circuit pack.
If stand-alone mode is entered successfully, the confirmation displays as shown in
mode confirmed,
Maintenance Procedures
December 2003
on page 230.
Packet and serial bus maintenance
Isolating and repairing packet-bus faults
Figure 66, Stand-alone
229