Connector And Cable Specifications - Cisco ASR 902 Installation Manual

Installing the Cisco ASR 902 Router
The pins on the alarm port are passive signals, and can be configured as Normally Open (an alarm is generated
when current is interrupted) or Normally Closed (an alarm is generated when a circuit is established) alarms.
You can configure each alarm input as critical, major, or minor. An alarm triggers alarm LEDs and alarm
messages. The relay contacts can be controlled through an appropriate third-party relay controller. The
open/close configuration is an option controlled in Cisco IOS.
To comply with the Telcordia GR-1089 NEBS standard for electromagnetic compatibility and safety,
Warning
connect the alarm ports only to intra-building or unexposed wiring or cable. The intrabuilding cable must
be shielded and the shield must be grounded at both ends. The intra-building port(s) of the equipment or
subassembly must not be metallically connected to interfaces that connect to the OSP or its wiring. These
interfaces are designed for use as intra-building interfaces only (Type 2 or Type 4 ports as described in
GR-1089-CORE) and require isolation from the exposed OSP cabling. The addition of Primary Protectors
is not sufficient protection in order to connect these interfaces metallically to OSP wiring.
Only pins 1, 2 and 8 are available for customer use. The remaining pins are for Cisco manufacturing test, and
should not be connected. Use a shielded cable for connection to this port for EMC protection. For a summary
of pinouts on the alarm port see Troubleshooting.
Connecting a Cable to the Fan Tray Alarm Port
This procedure describes how to connect a cable to the Cisco ASR 902 Router fan tray port.
Step 1 Attach an RJ45 cable to the alarm port.
Step 2 Attach the other end of the RJ45 cable to the relay controller.
For information about how to configure alarm trigger setting and map alarm inputs to critical, major, and minor alarm
conditions, see the

Connector and Cable Specifications

For more information on cable specifications and pinouts, see Troubleshooting.
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Cisco ASR 902 and ASR 902U Aggregation Services Router Hardware Installation Guide
Connector and Cable Specifications
Guide.
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