Additional maintenance procedures
Automatic Transmission Measurement System
398
Maintenance Procedures
December 2003
b
Complete Shutdown Failure – If an operating system level failure has occurred, it is
possible that the processor will never be yielded for the shutdown to begin, even after
process priorities are equalized by the recovery function at the 80 second interval. After
two minutes, the S8300 will be reset by the hardware watchdog. The LED sequence is as
follows:
1
After the shutdown button is pressed and held for at least two seconds, the “OK to
Remove” LED begins to flash at a constant rate. The TST LED flashes slowly at
first.
2
The TST LED remains flashing at a slow rate for 80 seconds, because shutdown
processing is being blocked by runaway processes. After 80 seconds, The
YELLOW ACT LED is illuminated, indicating that process priorities have been
equalized, and that diagnostic information has been saved for later analysis.
3
Despite the process re-prioritization, the shutdown is still blocked, and the TST
LED continues to flash at a slow rate. After two minutes, the hardware watchdog
resets the S8300. At this point, the RED ALM LED is illuminated and all others go
out. Although this begins restarting the S8300, it will be safe to remove the S8300
module from the G700 for approximately 15 seconds after the module resets.
Automatic Transmission Measurement System
The Automatic Transmission Measurement System (ATMS) performs transmission tests on analog trunks
to determine whether they are performing satisfactorily. The switch automatically originates test calls
from an Originating Test Line (OTL), over the trunks to be tested, to a Terminating Trunk Line (TTL) on
the switch at the far end of the trunk. Several different measurements of noise and attenuation are made
and compared to administered thresholds. Test measurements can be viewed in the form of detailed or
summary reports as described below.
ATMS test calls can be initiated on demand from the management terminal, or automatically by ATMS
trunk test schedules. Demand tests are run with the test analog-testcall command which is described
below.
Trunk groups can be administered to respond in different ways when a trunk fails to perform within the
administered thresholds. Alarms and errors may be logged, and the trunk can be automatically busied
out. When a trunk fails an unacceptable threshold twice, the system will busy it out if the trunk group is
so administered and doing so will not exceed an administered limit (25, 50, 75, or 100% of the members
in the group). This limit is not applied to later busyouts caused by other factors. Trunks can be manually
returned to service by changing the thresholds and running a demand test or by using the release
command.
ATMS requirements
ATMS tests utilize the analog port (port number 01) on a TN771 MT circuit pack. Depending on system
configuration, each PN may also contain one TN771. Multiple TN771s allow up to three concurrent test
calls.
AMTS tests are designed to operate on the types of trunks found in the US, and the TN771 analog port is
Mu-law companding only. The tests will not be useful in every environment.
Summary of Contents for CMC1
Page 1: ...Maintenance Procedures 555 245 103 Issue 1 1 December 2003 ...
Page 14: ...Contents 14 Maintenance Procedures December 2003 ...
Page 416: ...Additional maintenance procedures IP Telephones 416 Maintenance Procedures December 2003 ...
Page 426: ...Index X 426 Maintenance Procedures December 2003 ...
