Used Cisco Combined LAN/WAN Network Module

Part # NM-1FE1CT1

Product Description: Cisco 3600, 3700 Series -  1-Port F, Ethernet 1-Port Channelized T1/ISDN-PRI Network Module.

About the Cisco 3600 Series: "Modular high-density router for dial-access or router-to-router traffic. Supports ISDN, serial, channelized T1, digital modems, and ATM links. Also supports voice/fax and Frame Relay" (Cisco A Beginner's Guide Third Edition by Velte & Velte).

About the Cisco 3700 Series: "Modular routers, targeted at branch offices. Supports Frame Relay, ISDN, LL, X.25, ATM, fractional T1/E1, xDSL, T3/E3, HSSI WAN protocols" (Cisco A Beginner's Guide Third Edition by Velte & Velte).

Cisco 3600 Combined LAN/WAN Network Modules
Cisco 3700 Combined LAN/WAN Network Modules
Cisco Routers - Part Numbers Listed Alphabetically