Station Testing; Manual Line Testing; Ring Pretrip On Lcm Lines - Nortel DMS-100 Series Maintenance Manual

Post the failures at the LTP or output reports that the ALT log subsystem
generates. This action identifies the lines that do not meet standards of
quality to the switch operator. The failures identified are tested manually
and corrected.

Station testing

Station testing can occur under the LNS at a MAP terminal. Station testing
for the Silent Switchman (SSMAN) and Station Ringer (SR) tests can occur
from a station. Stations are tested manually.
Station test results appear at the VDU, except for the Station Ringer and
Silent Switchman tests. The station receives the results of these tests.
Station testing helps determine if a station functions correctly while
connected to a loop and line circuit combination.

Manual line testing

The switch operator performs manual line tests on line circuits, loops, and
stations. The switch operator tests line circuits and loops separately. The
results of the test appear to the switch operator at a visual display unit
(VDU). The results of the test appear immediately after testing.
Lines are tested manually as part of routine maintenance, when a customer
report is generated, or when an ALT failure occurs. Manual line testing
occurs at the LTP level and uses any of the four levels of the LNS. The four
levels of the LNS are: ALT, LTP, LTP manual (LTPMAN), and LTP line test
access (LTPLTA).
Manual line testing at the ALT level defines one line to test immediately.
At the other three levels, place the line in the control position to perform
manual testing. The switch operator controls this line, which can be
manipulated. Post a line before you place the line in the control position.

Ring pretrip on LCM lines

A ring pretrip is a premature ring trip. It is a false indication that the ringing
phone was answered.
In NA009, the PRETRIP nonmenu command is added to the LCM level.
The PRETRIP command provides operating company personnel the
option to enable or disable pretrip log reports on the posted LCM or all
LCMs in the posted set
option to enable or disable extension of the ring trip filter timing on all
4FR lines on the posted LCM or all LCMs in the posted set
DMS-100 Family OPAC Maintenance Manual XPM12 and up
Trouble isolation and correction 10-13