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. The PA-A3-T3 port adapters use a 75-ohm coaxial interface cable with BNC connectors to connect your router to an ATM T3 network. A single PA-A3-T3 contains one ATM T3 port (considered a DTE device )that consists of two connectors: a receive connector and a transmit connector. The Cisco-supplied 75-ohm coaxial cable, which comes with an attached ferrite bead and available in five different lengths: (10, 25, 50, 75, and 100 feet) has two BNC connectors that attach to the T3 port receptacles. The typical maximum distance between stations for T3 transmissions is 450 feet (137.2 meters). The ATM PA-A3 supports advanced ATM hardware features such as per-virtual circuit (VC) and per-virtual path (VP) traffic shaping, as well as support for most ATM service classes such as non-real-time Variable Bit Rate (nrt-VBR), Available Bit Rate (ABR) and Unspecified Bit Rate (UBR), and support of 4096 ATM VCs.
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