DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126
Issue 4
June 1999
Additional Maintenance Procedures
6-41Automatic Transmission Measurement System (ATMS)
6
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 which are described below.
ATMS test calls can be initiated on demand from the management terminal, or
automatically by ATMS Trunk Test Schedules. For complete details on how to set
up ATMS Trunk Test Schedules, see Chapter 4 of
Generic 3 V2 Implementation,
555-230-653
. 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 Maintenance/Test
circuit pack. Each PPN contains one TN771. Depending on system configuration,
each EPN may also contain one TN771. Multiple TN771s allow up to 3 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
all environments.
For ATMS tests to run, several administrative prerequisites must be met. The
following list shows the field entries necessary to enable testing.
