Nortel DMS-10 Series Installation, Operation And Maintenance Manual page 455

Procedure 6-3
Enhanced alarm cable troubleshooting
Step Description
30
If multiple error indications are triggered, proceed to step 6. If multiple error indications
are not triggered, return to the calling procedure and continue.
31
Remove the defective enhanced alarm cable from the DMS-100 side.
32
Follow the procedure in the associated IM for installing an enhanced alarm cable to
replace the defective model.
System temperature sensor(s)
The System Temperature Sensors are located inside the Power Supplies. To
test the operation of the Sensor Alarm, remove the J16 connector from the
input connector panel on the A or B chassis. Short pins 7 and 8 together.
Listen for the Office Alarm to be activated, if equipped. Remove the jumper.
Check the cable to both A and B chassis.
A BMC being used with DMS-100 Switching Systems can be equipped with
enhanced alarm cables. These cables allow the thermal and low voltage
alarms to be associated with an error message, a visual alarm and an audible
alarm. The text for the error messages is determined by the user. This text is
usually datafilled during initial system installation. Refer the associated IM
for more information. A BMC being used with a DMS-10 Switching System
cannot be equipped with the enhanced alarm cables. Use the following
procedure to resolve a system temperature alarm.
Procedure 6-4
System high temperature alarm
Step Description
CAUTION
Continuous operation of the BMC under extreme heat conditions will
degrade system operation.
33
Determine the ambient temperature of the affected chassis. The ambient temperature is
measured at the fan filter inputs on the rear of the BMC chassis inside the equipment bay.
BMC II BISYNC Operation, Administration, and Maintenance Guide BMCB001 and up
Section 060-INDP-610 Maintenance Procedures Guide 6-17
Sheet 1 of 2