Used Cisco 3700 Series Expansion Module

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).

Part # EM-HDA-4FXS

Product Description: Expansion Module, 4-Port Voice/Fax EM—FXS.

Directory of Cisco 3700 Expansion Modules