Nortel DMS-100 Manual page 444

Emergency shutdown of DMS system
Emergency shutdown of DMS system
At your Current Location
1
Notify network management personnel of the service interruption that will
occur.
2 Notify emergency services of the service interruption that will occur.
Emergency services include police, fire, and ambulance.
3 Proceed as follows:
If
dangerous environmental
conditions cause you to power
down the switch immediately
you have a minimum of 30 min
to power down the switch in the
correct order
4 To power off the PDCs, disconnect the A and B feeds at the power room.
Note: Perform the procedure in step 4 to power down the switch only if
necessary. Electricity can arc when you perform this procedure.
5 Go to step 18.
6 Use office records to identify the peripheral modules that host emergency
services like fire, police and medical assistance. Perform this procedure to
power down these peripherals last.
7 Power down the power converter for each maintenance trunk module shelf.
Do not power down the power converters required for emergency service
lines. You identified the power converters for emergency service lines in step
6.
Note: The line modules and digital carrier modules are older peripheral
modules. These older peripherals use universal tone receivers. The
universal tone receivers are in the maintenance trunk modules.
8 Power down the inverters for all MAPs and printers, except the operator MAP
terminal and one printer.
9 Power down the power converters on all digital trunk controllers and trunk
modules, except the power converters for emergency service
DMS-100 Family NA100 Recovery Procedures LET0015 and up
Emergency power conservation recovery procedures
WARNING
This procedure results in a complete loss of subscriber service
Nortel recommends that you contact Emergency-Technical
Assistance Services (ETAS) or the next level of support
before you perform this procedure.
Do
step 4
step 6
5-93
(continued)