Troubleshooting Dial Tone Problems - Nortel DMS-100 Series Maintenance Manual

3. Unseat the following cards:
• 6X51, 6X52, 6X53 cards from unit 1
• 6X50 (slot 20 of HIE shelf)
• 6X73 (slot 18 of HIE shelf)
• 2X70 (slot 25 of the HIE shelf)
Attempt to RTS FORCE unit 0.
4. If unit 0 fails to RTS, seat the cards into unit 1 again. Unseat the following
cards:
• 6X51, 6X52, 6X53 cards from unit 0
• 6X50 (slot 19 of HIE shelf)
• 6X73 (slot 17 of HIE shelf)
• 2X70 (slot 22 of the HIE shelf)
Reload unit 1 and enter the command string RTS FORCE.
5. The system can return the OPM to service and place the OPM in a C-side
busy (CBsy) state. SWACT the LGC. Enter the command string RTS
FORCE again.
6. The system can return the OPM to service and place the OPM in a system
busy (SysB) state. In this event, a defective 6X54 card, line card, or
drawer is present. Check logutil for a possible card list.
7. If any light-emitting diodes (LED) on the RGs are illuminated, refer to the
procedure Troubleshooting ringing generator problems.
8. If both units fail to RTS, contact the next level of support.
9. This procedure is complete.

Troubleshooting dial tone problems

Power-up the OPM. When one or both LCM units are in service, check the
line subgroups (LSG) to verify the LSGs have dial tone. If the LSGs do not
have dial tone. To troubleshoot the source of dial tone failure use the following
procedure:
1. If the even-numbered line subgroups (LSG) do not have dial tone, reseat
and/or replace the 6X52 card in unit 0.
2. If the odd-numbered LSGs do not have dial tone, reseat and/or replace the
6X52 card in unit 1.
3. If LSGs 0 through 9 do not have dial tone, verify with a voltmeter that TB1
lug 7 reads -48 V. This terminal block is located on the back of the frame
supervisory panel (FSP).
Advanced troubleshooting procedures 12-7
DMS-100 Family OPM Maintenance Manual XPM14 and up