Cisco Voice Interface Card - 4 port FXS or DID
Cisco VIC-4FXS/DID=, analog VIC, UTP, Cisco ICS 7750 and Cisco 1751 and 1760 series routers slot, RJ-11
Cisco VIC-4FXS/DID=. Data link protocols: analog VIC, Cabling technology: UTP. Slots: Cisco ICS 7750 and Cisco 1751 and 1760 series routers slot, I/O ports: RJ-11