wic-2t
The Cisco dual serial port WIC-2T provide higher levels of serial port density for a single WAN interface card and are supported on the Cisco 2600 and 1720 series. The Cisco WIC-2T supports speeds of up to a maximum port speed of 2.048 Mbps. Each port can be configured independent of the other allowing support for different physical interfaces ( protocol and DTE / DCE ). The Cisco WIC-2T supports mixed asynchronous and synchronous operation on a single card as well.

The dual-serial port WAN interface card features Cisco's new, compact, Smart Serial connectors to support a wide variety of electrical interfaces when used with the appropriate transition cable. This includes : V.35, RS-232, RS-449, RS-530, RS-530A in male and female versions for both DCE and DTE devices. This feature provides easy configuration and re-configuration as network requirements change without the need of purchasing a different serial interface card.