AT&T System 25 User Manual
Page 220
MAINTENANCE
ERROR MESSAGE
AND DESCRIPTION
POSSIBLE SOLUTION
S e r v i c e Circuit
Test
Failed:
Check TDM bus terminator and
Service Circuit demand test failed
cabinet interconnect cables. If the
on the DTMF receivers.
problem persists, replace ZTN85
or ZTN131 (R3).
Signaling Lead Fault: Auxiliary
C h e c k
wiring of
e x t e r n a l
Trunk CP is expecting a ground
from external equipment but none
is detected.
S l o t
Configuration
Error:
This condition can be resolved by
(STARLAN Interface CP) This
moving the ZTN84 port CP to
error means that another ZTN84
another slot in the carrier.
port CP is on the STARLAN
NETWORK and has the same
physical address.
System Lock-Up: This error is
Usually, no
action required;
logged by the task supervisor if,
however if
problem persists,
during scheduling of tasks, no
replace CPU/Memory CP.
messages have been read for at
least 60 seconds. This causes a
restart of the system.
System Restart: System locked
Check the power supply voltages
up in a software task. The “Port
per Figure 4-2. If problem persist,
Number” entry in the log is the
the CPU/Memory CP could be
task at fault.
defective.
Translation Memory Test Failed:
Check if Cold Start error has
Memory translation checksum test
occurred.
Reload translations
f a i l e d .
from tape per the procedure in
Administration Manual. If the
problem
persists,
c h e c k o r
replace CPU/Memory CP.