Nortel DMS-100 Manual page 135

2-88 System level recovery procedures
Recovering from a dead system in a SuperNode SE switch
Recovering from a dead system in a SuperNode SE switch
At the PDC
1
2
3
297-8021-545 Standard 14.02 May 2001
DANGER
Contact ETAS or the next level of support
In the event of a dead system, contact Emergency
Technical Assistance Services (ETAS) of Nortel. Make
sure you contact the next level of support before you
perform this procedure.
DANGER
Risk of electrocution
Do not touch the cabinet wiring. Contact with cabinet
wiring that is not shielded can result in electric shock.
Only qualified power maintenance personnel can perform
the voltage measurements in step 3.
As soon as possible after detection of the power failure, remove :
• fuse holders for the line concentrating equipment (LCE) talk batteries
• talk batteries for the trunk module equipment (TME)
• filter fuses for the power distribution center (PDC) from the appropriate
PDCs
Note: The location of the fuse holders in the fuse panel can vary,
according to your office configuration. Consult the fuse assignment
diagram for your office for help to locate the fuse holders. Contact the next
level of support for help to locate the fuses.
Determine if a -48 V dc feed or a -60 V dc feed powers the system.
If
a -48 V dc feed powers the
system
a -60 V dc feed powers the
system
When you receive information that power returned to power plant for your
office, consult power maintenance personnel. Have power maintenance
personnel verify that acceptable power returned at each PDC. At the rear of
each PDC, measure the dc voltage across the A feed bus and the battery
Do
step 3
step 4
(continued)