DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126
Issue 4
June 1999
Alarms, Errors, and Troubleshooting
5-88Packet Bus Fault Isolation and Repair
5
The Analog Trunk Testing functions are discussed in the
‘‘TIE-TRK (Analog Tie
Trunk)’’,
‘‘DID-TRK (Direct Inward Dial Trunk)’’
,
‘‘CO-TRK (Analog CO Trunk)’’
,
and
‘‘AUX-TRK (Auxiliary Trunk)’’
, sections in
Chapter 9, ‘‘Maintenance Object
Repair Procedures’’.
NOTE:
All Maintenance/Test circuit packs must be of TN771D vintage or later.
TN771D Packet Functions
The Maintenance/Test packet bus port (M/T-PKT) provides the packet bus testing
and reconfiguration capabilities. When the port is in service, it continuously
monitors the packet bus for faults and fault recoveries, and reports results to
PKT-BUS maintenance.
The yellow LED on the TN771D Maintenance/Test circuit pack provides a visual
indication of the state of the packet bus:
NOTE:
It takes 5 to 10 seconds for the LED to respond to a change in the state of
the packet bus.
During normal switch operation, the Maintenance/Test provides visual feedback
of the packet bus state. When in standalone mode (see the next section), these
visual indications are still present, but the packet bus is never reconfigured. The
yellow LED either blinks or is off.
Flashing Flashing of the yellow LED once per second indicates that there
are too many faults for the Maintenance/Test packet bus port to
recover by swapping leads.
The packet bus may be unusable
.
If the failures detected are open lead failures, the packet bus
may still be operating.
On steady The Maintenance/Test packet bus port has swapped leads on
the packet bus to correct a fault.
The packet bus is still
operating
. Or, one of the other ports on the Maintenance/Test
circuit pack is in use.
NOTE:
First busy out the Maintenance/Test circuit pack ports
used for other than packet bus testing before using the
Maintenance/Test circuit pack to help resolve packet bus
faults. This is done by entering
busyout port
UUCSS
01,
busyout port
UUCSSl
02
, and
busyout port
UUCSS
03
. Be
sure to release these ports when the process is
completed.
Off There is no packet bus fault present.
