Check the listing for details. CISCO VIC3-2FXS/DID 2-Port High-Density FXS/DID Voice Fax Interface Card Module. Condition: Used. Listed at 12.94 USD. CISCO VIC3-2FXS/DID 2-Port High-Density FXS/DID Voice Fax Interface Card Genuine CISCO. SERIAL and HOLOGRAM Intact. Compatible with 2800, 3800, 2900 and 3900 series Routers. "VIC3-2FXS/DID2-port FXS/DID voice/fax interface card.FXS port is used to connect directly to phones, fax machines, and key systems. Generates battery polarity reversal and caller ID.DID port is used to provide off-premises DID connection from central office. Serves only incoming calls from the PSTN. Does not support caller ID in DID mode. Table 6. VIC3-2FXS/DID Specifications: 2-Port FXS/DID Voice/Fax Interface Card (for On-Premise Use Only) FeatureDescriptionInterface TypeFXS (on-premise connection only) and DID trunkCisco IOS Software Release12.4(20)TCisco Part Number800-30501-01ComplianceFCC Class B device, CESafety ConformanceUL1950SpareVIC3-2FXS/DID=Address Signaling Formats• In-band DTMF• Out-of-band pulse ( 8-12 pps)Signaling ModesFXS: Loop-start, ground-startDID: Immediate, Delay-dial, WinkStartDID Loop ResistanceUp to 1800 ohms (including terminal equipment)FXS Loop ResistanceUp to 600 ohms (including phone or terminal equipment)On-Hook Voltage -44VOff-Hook Loop Current25 mA (max)Ringing ToneConfigurable for different country requirementsRinging Voltage45 Vrms into 5REN at zero loop length (balanced)Ringing Frequencies20 Hz, 25 Hz, 30 Hz, 50 HzREN Loading5 REN/port, 8 REN/VIC (max)Disconnect SupervisionPower denial (Calling Party Control, far-end disconnect)Caller IDOn-hook transmission of frequency-shift-keying (FSK) dataLoop Length