Cisco Cisco VN 2900 Network Adaptation Interface Installation Guide

The following safety warnings apply to installation procedures involving Cisco T1/E1 HWICs. 
Translations of these warnings are available in the 

 document, which is available online.

To avoid electric shock, do not connect safety extra-low voltage (SELV) circuits to telephone-network 
voltage (TNV) circuits. LAN ports contain SELV circuits, and WAN ports contain TNV circuits. Some 
LAN and WAN ports both use RJ-45 connectors. Use caution when connecting cables. Statement 1021

Hazardous network voltages are present in WAN ports regardless of whether power to the unit is OFF 
or ON. To avoid electric shock, use caution when working near WAN ports. When detaching cables, 
detach the end away from the unit first. Statement 1026

T1/E1 HWICs have 2 LEDs for each port that indicate the functionality of the T1 or E1 connection. 

, and 

 show the front panels and LEDs on the 1-port, 2-port, and 

4-port HWICs, respectively. The LEDs are described in 

.

RJ-48C connector

Port number

CD/LP LED (bicolor LED)

AL LED

170619