The PA-A3 port adapter is a generation of single-width, single-port, ATM, Peripheral Component Interconnect (PCI)-based port adapters. The PA-A3 is supported in the Catalyst RSM/VIP2, Cisco 7100 series, Cisco 7200 series, and Cisco uBR7200 series routers, and the VIP2 and VIP4 in Cisco 7000 series and Cisco 7500 series routers.