Cisco Cisco VN 2900 Network Adaptation Interface Guía De Instalación

This document provides an overview of Cisco interface cards used in Cisco access routers, and contains 
the following sections:

Cisco interface cards are classified according to the technologies they support. For example, WAN 
interface cards (WICs) support WAN technologies, such as Gigabit Ethernet; and voice interface cards 
(VICs) support voice technologies. Voice/WAN interface cards (VWICs) can support voice, data, and 
voice and data applications, depending on the capabilities of the router in which the VWIC is installed. 
Enhanced High-speed WAN interface cards (EHWIC) provide expanded LAN and WAN capabilities, 
such as Gigabit Ethernet and Ethernet switching.

EHWICs are supported on Cisco 1861-E, Cisco 1900 series (modular), Cisco 2900 series, and Cisco 
3900 series routers.