Troubleshooting
Line Type Tests (#73)
Summary: The I/O hardware diagnostic requires different procedures on different line types for checking
out various hardware, including remotes and wiring. These procedures bypass all program-
ming by directly operating relays and circuits based upon physical numbers. Therefore, after
connecting a relay or phone line, disconnect it before proceeding to the next physical num-
ber. Reset the system after using this function or ensure no connections remain which will
interfere with service.
Note:
Practice these procedure on a demo or known good system before using it in an actual
troubleshooting situation.
C.O. & PBX Trunks
Step 1. Dial #73, then enter the lowest or highest physical number of the type of trunk to be tested.
Step 2. Press
[1]
and verily one of the following conditions exist:
Trunk busy: The system connects the test phone and its receiver to the link in use.
The LL field of the display will reflect the change. and a conference-call will
exist between the trunk users and test phone.
Say,
“Testing”
to announce your presence and immediately press
[
4] to dis-
connect from the link and return to the test phone link.
Caution:
Do not
press
[
4] again, it will disconnect the specified line from the trunk and the
call in progress will be cut-off.
Trunk idle: Dial tone is received at the test phone.
Press [4] to restore the trunk to idle.
Step 3. Press
[
7]
or
[ *]
to go to the next physical number and return to
Step 2
until all trunks have
been tested.
Special Notes on Central Office
Trunks:
Pressing
[1]
to connect a trunk establishes loop current to the C.O. and lights the CO LED on
the associated COA module. However, if the C.O. trunk is held too long due to a defect in the
TCIV (software or other), the C.O. may cut-off or sharply reduce its d.c. feed to the trunk line.
If this happens, pressing
[1]
will not get dial tone or turn on the CO LED. The trunk will
appear dead, even with a linemans test set.
Correct the condition by opening the loop for a few seconds and then closing it. Do
this by pressing
[
4] twice . . . waiting a few seconds . . . and then pressing [ 1].
When a trunk line is ringing-in, there will be a + in the HT display field. When the ringing
stops, and after a several second delay, the + will change to a -. If a special provision has
been made for an external service request, the + will remain as long as the external service
request is asserted.
1989 Rauland-Borg Corporation (Orig. 10/88; Rev. t/89) Page 7 of 30
