Cisco VIC-4FXS/DID Voice Interface Card

Feature	Description
Ports	4
Port Type	Selectable FXS (Foreign Exchange Station) or DID (Direct Inward Dial)
Compatibility	Cisco 1700, 1751, and 1760 routers
Installation	WIC/VIC or VIC slot
Functionality	Connects analog phones, fax machines, or analog trunks
Caller ID	Supported

Description: The Cisco VIC-4FXS/DID is a voice interface card that provides four ports for connecting traditional analog devices to a Cisco router. It offers flexibility by allowing each port to be configured as either FXS or DID. FXS Mode: In FXS mode, the port functions like a standard phone line, providing power and dial tone to analog phones or fax machines. DID Mode: In DID mode, the port acts as an analog trunk line, allowing external callers to dial directly into specific extensions on the router. This card is ideal for small businesses that need to integrate their existing analog phone system with a Voice over IP (VoIP) network. It enables them to leverage the cost benefits of VoIP for long-distance calls while maintaining functionality for local calls and analog devices.