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The Cisco Forth-generation Analog voice network interface card NIM-2FXS/4FXO integrates 2 ports of FXS (Foreign Exchange Subscriber) and 4 FXO (Foreign exchange Office) to connect analog phones to it and re-use your analog phones with a VoIP phone system. FXS/FXO allows you to easily continue using your existing PSTN lines and/or analog phones. The new generation analog voice network module has build-in DSP (Digital signal processor) and does not require the router to have the dedicated PVDM on the motherboard, and it also provides for echo cancellation of up to 128-ms echo-tail for demanding network conditions.
Compatibility : Cisco 4451-X, 4451-X Application Experience, 4451-X Integrated Services Router, 4451-X Integrated Services Router Security Bundle, 4451-X Integrated Services Router Voice and Video Bundle, 4451-X Integrated Services Router Voice Security Bundle
Cisco Part Numbers : NIM-2FXS/4FXO, NIM-2FXS/4FXO=
UPC : 00882658659454