Cisco Cisco VN 2900 Network Adaptation Interface Guía De Instalación

Connecting Cisco T1/E1 High-Speed WAN Interface Cards on Cisco 1861 Integrated Services Routers

T1/E1 HWICs

Cisco IOS Release 12.5(1)T

Figure 1

HWIC-1T1/E1 Front Panel

Supported Platforms

The HWIC-1T1/E1 is supported on the Cisco 1861 integrated services router (ISR).

Note

Use Cisco Feature Navigator to find information about platform support and Cisco IOS software
image support. Access Cisco Feature Navigator at

http://www.cisco.com/go/fn

. You must have

an account on Cisco.com. If you do not have an account or have forgotten your username or
password, click Cancel at the login dialog box and follow the instructions that appear.

Prerequisites for Connecting a T1/E1 HWIC to a Network

Before connecting a T1/E1 HWIC to a network, ensure that the HWIC is installed in the router, that the
equipment is properly grounded, and that you have the proper cables for connecting the HWIC to the
network. This section describes the preparation necessary before connecting a T1/E1 HWIC to the
network.

Grounding

Ensure that the equipment you are working with is properly grounded. For instructions on grounding
your HWIC, see

Installing Cisco Interface Cards in Cisco Access Routers

T1/E1 channelized port

Carrier detect/loopback LED

Port 0

Alarm LED

Table 1

T1/E1 DSU/CSU HWIC LEDs and Loopback Button

Feature

Color

Description

CD/LP LED

Green/Yellow

Green—Internal DSU/CSU in the HWIC is communicating with
another DSU/CSU. This LED is on during normal operation.
Yellow—Interface card is in loopback mode

Off

Normal operation.

AL LED

Yellow

Remote station has an alarm condition.

Off

Normal operation.

HWIC-
1T1/E1

CD/LP

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