Automatic Transmission Measurement System - Avaya S8700 Maintenance Manual

Additional Maintenance Procedures
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 EPN 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.
For ATMS tests to run, several administrative prerequisites must be met. The
following list shows the field entries necessary to enable testing.
5-34 Issue 1 May 2002 555-233-143