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DEFINITY Enterprise Communications Server Release 5
Maintenance and Test for R5vs/si
555-230-123
Issue 1
April 1997
Maintenance Object Repair Procedures
Page 10-1539UDS1-BD (UDS1 Interface Circuit Pack)
10
Attempt to clear the alarm via the following commands:
busyout board
PCSS
,
test ds1-loop PCSS ds1/csu-loopback-tests
,
release board PCSS
.
If the ELB test continues to fail, then either the TN464F board, the CSU
Module, or the I/O cable between the backplane and the CSU module (or
any combination thereof) has failed. Attempt to isolate where the failure is
occurring by reexecuting the test by replacing one piece of hardware at a
time.
p. RLB failure. This error occurs when the Integrated CSU (I-CSU) Module
Repeater Loopback (RLB) test fails. This test is executed by the I-CSU
during I-CSU power-up/reset (i.e.- TN464F board physically inserted and
120A1 CSU Module already installed) or when the 120A1 CSU Module is
plugged on to an already initialized DS1 board. The RLB test is also
executed as part of the command
test ds1-loop PCSS
ds1/csu-loopback-tests
.
Attempt to clear the alarm via the following commands:
busyout board
PCSS
,
test ds1-loop PCSS ds1/csu-loopback-tests
,
release board PCSS
.
If the RLB test continues to fail, then the CSU Module needs to be
replaced.
q. CPE Loopback Jack deactivation error. This error occurs when the
TN464F circuit pack could not deactivate a CPE Loopback Jack loopback
on power-up/reset or upon software request.
Attempt to clear the alarm via the following commands:
busyout board
PCSS
,
test ds1-loop PCSS end-loopback/span-test
,
release board PCSS
.
If the attempt to deactivate the CPE Loopback Jack loopback continues to
fail, other steps must be taken to deactivate the loopback.
r. Far CSU Loopback deactivation error. This error occurs when the TN464F
circuit pack could not deactivate a far-end CSU loopback on
power-up/reset or upon software request.
Attempt to clear the alarm via the following commands:
busyout board
PCSS
,
test ds1-loop PCSS end-loopback/span-test
,
release board PCSS
.
If the attempt to deactivate the Far CSU loopback continues to fail, then
escalate the problem.
s. LAN Bus Timeout Error. This error occurs when the circuit pack transmits
too many bytes on the LAN bus for a single frame. This condition may be
caused by an on-board fault or by faulty data received on one of the
circuit pack’s external ports. If any of the ports on this circuit pack are
alarmed, refer to the repair procedures for those maintenance objects.
If the error occurs three times within 10 minutes, the board will be isolated
from the Packet Bus and the board will be alarmed. To clear the alarm and
restore the board to the Packet Bus, use the following commands:
busyout board PCSS, reset board PCSS, test board PCSS long,
release board PCSS.
If the problem persists, and there are no PKT-BUS alarms or port alarms,
then replace the circuit pack.