Installing An External Alarm Cable - Nortel 7400 Hardware Installation

Installing an external alarm cable

Prerequisites
Procedure steps
Multiservice Switch 7400 Hardware Installation, Maintenance, and Upgrade 6.1S2
Install an external alarm if you want alarms raised by device hardware to
generate a light or sound in up to three different locations.
• Ensure that you have made an alarm cable to suit your installation and in
accordance with the connector pinout information in NN10600-170
Nortel Networks Multiservice Switch 7400 Hardware Description. The
alarm cable must be shielded to comply with electromagnetic
interference (EMI) requirements. See "Making a braided shield"
(page 379).
• If you are using long cables, ensure that your alarm system is not
impeded by cable resistance or voltage drop.
• Follow "Avoiding damage from static electricity" (page 208) to protect
the unit from damage by ESD or from transferring ESD to other
hardware.
1 If this is a Multiservice Switch 7440, connect the alarm cable to the
external alarm connector on the rear of the device as shown in the figure
"Multiservice Switch 7440 alarm connector and cutoff control" (page 319).
or
If this is a Multiservice Switch 7460, connect the 15-pin D-sub of the alarm
cable to the external alarm connector on the rear of the device at Alarm 2
as shown in the figure "The external alarm connector of a Multiservice
Switch 7460" (page 320).
or
If this is a Multiservice Switch 7480, connect the alarm cable to the Alarm
2 connector on the rear of the device. See the figure "Dual alarm shelf
interconnection between two Multiservice Switch 7480s" (page 318).
2 Connect the other end of the cable to your remote alarm device.
Chapter 39 Hardware procedures 317