we are the professional agent of cisco.The dual-serial port WAN interface cards (WICs) for the Cisco 1800 and 2800 ,3800 series. feature Cisco's new, compact, high-density Smart Serial connector to support a wide variety of electrical interfaces when used with the appropriate transition cable. Two cables are required to support the two ports on the WIC. Each port on a WIC is a different physical interface and can support different protocols such as Point-to-Point protocol (PPP) or Frame Relay and Data Terminal Equipment/Data Communications Equipment (DTE/DCE). benxyh#htmail#com you can find our company on cisco website.