The dual-serial port WAN interface cards (WICs) for the Cisco 1800 and 2800 ,3800series.feature Cisco's new, compact, high-density Smart Serial connector to support awide variety of electrical interfaces when used with the appropriate transitioncable. Two cables are required to support the two ports on the WIC. Each port ona WIC is a different physical interface and can support different protocols suchas Point-to-Point protocol (PPP) or Frame Relay and Data Terminal Equipment/DataCommunications Equipment (DTE/DCE). producing area:China