Used Cisco 3600 Series Expansion Modules

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).

Part # NM-HDA-4FXS

Product Description: High-Density Analog Voice...

Part # NM-HDA-8FXS

Product Description: Eight-Port FXS Voice/Fax...

Part # EM-HDA-4FXO

Product Description: Four Port FXS Voice/Fax...

Part # EM2-HDA-4FXO

Product Description: Enhanced four Port FXO...

Part # DSP-HDA-16

Product Description: 16-Channel DSP Module...

Cisco Routers - Part Numbers Listed Alphabetically