Cisco Cisco 1900 2900 3900 Series 4-Port Gigabit Ethernet HS-WIC with PoE

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1-Port and 2-Port HWIC data/voice, 4-Port T1/E1 
HWIC, and 8-Port T1/E1 Network Module
Last Updated: August 18, 2011, OL-25634-01
This document describes the following Cisco products: 
Cisco 1-Port and 2-Port Channelized T1/E1 and ISDN PRI High-Speed WAN Interface Cards 
(HWICs)
1-port part number: HWIC-1CE1T1-PRI
2-port part number: HWIC-2CE1T1-PRI
Provides channelized T1 or E1 connections or ISDN PRI connections
Supported on Cisco 2821, Cisco 2851, Cisco 3800, Cisco 2900, and Cisco 3900 series routers
Cisco 4-Port T1/E1 HWIC
Part number: HWIC-4T1/E1
Provides clear channel T1 or E1 connections
Supported on Cisco 2821, Cisco 2851, Cisco 3800, Cisco 2900, and Cisco 3900 series routers
Cisco 8-Port Channelized T1/E1 and ISDN PRI High-Speed WAN Network Module
Part number: NM-8CE1T1-PRI
Provides channelized T1 or E1 connections or ISDN PRI connection
Supported on Cisco 3800, Cisco 2900, and Cisco 3900 series routers