Cisco 2500 Series Routers

The Cisco 2500 Series Single LAN/Dual WAN routers combine local-area network (LAN) routing capability with two synchronous wide-area network (WAN) options. This means one serial port can be used for a Frame Relay connection, the second serial port for a legacy device, such as a cluster controller, and the optional integrated services digital network basic rate interface (ISDN BRI) port can be used for bandwidth-on-demand, or disaster recovery.