Cisco WAI-OC12-1SSLR is a part of the Catalyst 8500 Series – Catalyst 8500 — ATM Port Adapter Module. The Cisco Catalyst 8500 is a Layer 3-enhanced ATM switch that seamlessly integrates wire-speed Layer 3 switching and ATM switching – eliminating the need to make a technology choice. The Catalyst 8500 family delivers campus and metropolitan network solutions with scalable performance – lower cost of ownership – and intranet-based application features to deliver increased business productivity. Unlike old first- or second-generation ATM switches that force customers to have a costly – inefficient – multi-system solution – the Catalyst 8500 switch provides an integrated ATM and Gigabit Ethernet solution in a single chassis.