Cisco Cisco VN 2900 Network Adaptation Interface Installation Guide

This document describes Cisco 10/100BASE-T Ethernet switch high-speed WAN interface cards 
(HWICs) and how to connect Cisco 10/100BASE-T Ethernet HWICs to the network, and contains the 
following sections:

For an overview of Cisco interface cards used for Cisco access routers see the 

 document.

The Cisco 10/100BASE-T Ethernet switch HWIC is available as a 4-port single-wide HWIC 
(HWIC-4ESW), and as an (8+1)-port double-wide HWIC (HWIC-D-9ESW), providing Layer 2 
switching for Cisco modular access routers.

To comply with the Telcordia GR-1089 NEBS standard for electromagnetic compatibility and safety, 
connect the 4-port single-wide HWIC (HWIC-4ESW), 4-port single-wide HWIC with PoE 
(HWIC-4ESW-POE), (8+1)-port double-wide HWIC (HWIC-D-9ESW), and (8+1)-port double-wide 
HWIC with PoE (HWIC-D-9ESW-POE) only to intra-building or non-exposed wiring or cabling. The 
intrabuilding cable must be shielded and the shield must be grounded at both ends.