Avaya Definity SI Maintenance Manual page 765

The Maintenance/Test Circuit Pack (TN771D)
Entering and Exiting Standalone Mode
NOTE:
When in standalone mode, the red LED on the TN771 is lit. This function is
correct, and it serves as a reminder to remove the TN771 from standalone
mode.
!
CAUTION:
The TN771 in standalone must be the ONLY TN771 in the port network. If a
TN771 is already in the port network, place that TN771 in standalone mode.
Do not insert a second TN771 into standalone mode. System behavior is
rendered as undefined if this is done. In addition, the system is not able to
detect the extra circuit pack in this case because a TN771 in standalone
mode is invisible to the SPE.
!
CAUTION:
If the TN771 Packet Bus port has reconfigured the Packet Bus in a switch
with a High or Critical Reliability system, (indicated by error type 2049
against PKT-BUS), placing the Maintenance/Test in standalone mode
causes a loss of service to the Packet Bus. This is true because
reconfiguration is not performed in standalone mode. Therefore, this
procedure should be considered a service-disrupting procedure.
If the system has a TN771 installed in the Port Network to be examined, use the
following steps to enter the standalone mode:
1. Ensure that Alarm Origination is suppressed either at login time or via the
Maintenance-Related System Parameters form.
2. Attach the 258B Six-Port Male Amphenol Adapter to the Amphenol
connector for the TN771's slot. Connect one end of a D8W 8-wire modular
cable to port 1 of the 258B. 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 TN771 circuit pack.
555-233-123
NOTE:
In a High or Critical Reliability system, this causes a Minor, Off-board
alarm to be raised against the Packet Bus. This alarm is not resolved
until the TN771 (in particular, the Packet Bus port is returned to
service. To ensure that Packet Bus alarms have been cleared, it may
be necessary to restore the TN771 to normal mode.
Issue 4 May 2002 9-13