Cisco voice interface cards (VICs) support voice technologies. VICs can be installed in interface card slots on supported Cisco access routers or in 1- or 2-slot voice network modules that are installed in network module slots on supported Cisco access routers.

A Foreign Exchange Station (FXS)/Direct Inward Dialing (DID) interface connects directly to a standard telephone, fax machine, or similar device. This interface supplies ringing voltage, dial tone, and so on to the station.

Specification

Product
Product id	258830
Brand	Cisco Systems
Partnr	VIC3-4FXS/DID=
EAN/UPC code	882658162169
Protocols
Supported network protocols	FXO/FXS, DTMF
Operational conditions
Operating temperature (T-T)	10 - 35 °C
Operating relative humidity (H-H)	10 - 80 procent
Network
Quality of Service (QoS) support	Y
Voice codecs	G.711, G.722, G.723.1, G.726, G.728, G.729, iLBC
VoIP protocols	cRTP
Modem (RJ-11) ports	4
Noise reduction	Y
Caller ID	Y
Compatible operating systems	Cisco IOS