Troubleshooting Rts Failure; Troubleshooting Dial Tone Problems - Nortel DMS-100 Series Maintenance Manual

12-6 Advanced troubleshooting procedures

Troubleshooting RTS failure

Implement the RTS FORCE command if the RLCM fails to RTS. The
following procedure describes the RTS FORCE procedure.
1 Check logutil for RTS failure reasons.
2 Replace any cards on the card list given at the MAP level or in the logs.
3 Unseat the 6X51, 6X52, and 6X53 cards from unit 1. Unseat the 6X50
4 If unit 0 fails to RTS, reseat the cards into unit 1. Unseat the 6X51,
5 If the RLCM returns to service (RTS), and a C-side busy (CBsy) follows,
6 If the RLCM RTS, and a system busy (SysB) follows, a defective 6X54
7 If any light-emitting diodes (LED) on the RGs illuminate, go to the
8 If both units fail to RTS, contact your next level of support.
9 The procedure is complete.

Troubleshooting dial tone problems

After you power up the RLCM and one or both LCM units are in service,
check the line subgroups (LSG). Verify the LSGs have dial tone. If the
LSGs do not have dial tone, use the following procedure to troubleshoot the
source of dial tone failure.
1 If the even line subgroups (LSG) do not have dial tone, reseat and/or
2 If the odd LSGs do not have dial tone, reseat and/or replace, the 6X52
3 If LSGs 0 to 9 do not have dial tone, verify with a voltmeter that TB1
4 If LSGs 10 through 19 do not have dial tone, verify with a voltmeter that
5 If you do not have dial tone, contact the next level of support.
297–8351–550 Standard 04.01 August 1999
(slot 20 of HIE shelf), 6X73 (slot 18 of HIE shelf), and the 2X70 (slot 25
of the HIE shelf) cards. Attempt to RTS FORCE unit 0.
6X52, and 6X53 cards from unit 0. Unseat the 6X50 (slot 19 of HIE
shelf), 6X73 (slot 17 of HIE shelf), and 2X70 (slot 22 of the HIE shelf)
cards. Reload unit 1 and attempt a RTS FORCE.
SWACT the LGC and attempt again.
card, line car, or drawer can be present. Check logutil for a possible card
list.
procedure, Troubleshooting ringing generator problems.
replace, the 6X52 card in unit 0.
card in unit 1.
lug 7 reads –48 V. This terminal block is on the back of the frame
supervisory panel (FSP). This voltage is the talk-battery supply for these
drawers. This voltage comes from the power distribution center (PDC)
for this frame. Check the fuse in the PDC if the voltage is not present.
TB1 lug 8 reads –48V. This voltage is the talk-battery supply for these
drawers.