The Cisco 2-Port Serial WAN Interface Card is designed to enhance the dependability and productivity of your network. This module features two asynchronous/synchronous serial ports, making it ideal for wide area network applications. With a maximum data transfer rate of 115.20 kbit/s, it ensures efficient data communication. The card is compatible with various Cisco Integrated Services Routers, including the 1841, 2801, 2811, 2821, 2851, 3825, and 3845 models. Its compact design (5.6" depth, 0.8" height, and 3.1" width) allows for easy integration into existing systems, while a limited warranty of 90 days provides peace of mind.