The Cisco SPA112 2 Port Adapter enables high-quality VoIP service with a comprehensive feature set through a broadband Internet connection. Easy to install and use, it works over an IP network to connect analog phones and fax machines to a VoIP service provider and provides support for additional LAN connections. Cisco SPA112 VoIP Gateway - 2 x FXS 1 x 10/100Base-TX Network WAN.