Cisco Cisco VN 2900 Network Adaptation Interface Installation Guide

This chapter describes how to connect Cisco T1/E1 high-speed WAN interface cards (HWICs) to a 
network. It contains the following sections:

T1/E1 HWICs provide T1 and E1 support to Cisco 2800 series and Cisco 3800 series integrated services 
routers. T1 support has integrated CSU/DSU capability.

The following T1/E1 HWICs are available:

1-port channelized

2-port channelized

4-port clear channel

Supported platforms are:

Cisco 2811

Cisco 2821

Cisco 2851

Cisco 3825

Cisco 3845