Cisco offers a variety of WAN Interface Cards for Cisco 3600 series. WAN interface cards are available as daughter cards to the mixed-media LAN/WAN network modules. Up to two WAN interface cards can be installed on a single, mixed-media LAN/WAN network module. The WAN interface cards are not included in the price of the mixed-media network modules. This is a one-port high speed serial WAN Interface Card.