Cisco Systems ASR 903 Connecting the Fan Tray Alarm Port, Connector and Cable Specifications

Chapter 3 Installing the Cisco ASR 903 Router

Connecting the Cisco ASR 903 Router to the Network

Table 3-2	Interface Cables for 68-Pin Connector
Cable Type		Product Number	Length	Male/Female	Connector
4-port EIA-232 DTE		CAB-HD4-232MT	10 ft.	Male	DB-25
4-port EIA-232 DCE		CAB-HD4-232FC	10 ft.	Female	DB-25
4-port EIA-232 DTE		CAB-QUAD-ASYNC-F	10 ft.	Female	RJ-45
4-port EIA-232 DTE		CAB-QUAD-ASYNC-M	10 ft.	Male	RJ-45
4-port EIA-232 DTE		CAB-9AS-M	10 ft.	Male	DB-9

For more information on cable specifications and pinouts, see Chapter 5, “Troubleshooting”.

Connecting the Fan Tray Alarm Port

The fan tray includes an alarm port that maps to 4 dry contact alarm inputs.

The pins on the alarm port are passive signals and can be configured as Normally Open (an alarm 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 any appropriate third-party relay controller. The open/close configuration is an option controlled in IOS.

Warning To comply with the Telcordia GR-1089 NEBS standard for electromagnetic compatibility and safety, 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, 4, 6, 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. Table 5-4summarizes the pinouts on the alarm port in Chapter 5, “Troubleshooting.”

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 map alarm inputs to critical, major, and minor alarm conditions, see the Cisco ASR 903 Router Software Configuration Guide.

Connector and Cable Specifications

For more information on cable specifications and pinouts, see Chapter 5, “Troubleshooting”.

	Cisco ASR 903 Router Hardware Installation Guide
OL-25178-05		3-47