The PA-T3 serial port adapter can be installed in the following slots on the hardware platforms described in this document:
•VIP2—Port adapter slot 0 and port adapter slot 1
•Catalyst RSM/VIP2—Port adapter slot 0 and port adapter slot 1
•Cisco 7100 series routers—Port adapter slot 3 in the Cisco 7120 series and port adapter slot 4 in the Cisco 7140 series
•Cisco 7200 series routers—Port adapter slot 1 and slot 2 of the Cisco 7202; port adapter slot 1 through slot 4 of the Cisco 7204 and Cisco 7204VXR; port adapter slot 1 through slot 6 of the Cisco 7206 and Cisco 7206VXR
•Cisco uBR7200 series routers—Port adapter slot 1 and slot 2 of the Cisco uBR7246; port adapter slot 1 of the Cisco uBR7223
The one-port PA-T3 serial port adapter provides two network interfaces per VIP2 for Cisco 7000 series and Cisco 7500 series routers, two network interfaces per Catalyst RSM/VIP2, and one high-speed interface on the Cisco 7200 series and Cisco uBR7200 series routers. The two-port PA-2T3 serial port adapter provides four network interfaces per VIP2 for Cisco 7000 series and Cisco 7500 series routers, four network interfaces for the Catalyst RSM/VIP2, and two high-speed interfaces on the Cisco 7200 series and Cisco uBR7200 series routers. Serial network interfaces reside on modular port adapters, which provide a direct connection between the high-speed bus in the router and the external networks. The PA-T3 serial port adapter provides a full-duplex synchronous serial PA-T3 interface for transmitting and receiving data at rates of up to 34 megabits per second (Mbps).
The port adapter supports both 16- and 32-bit cyclic redundancy checks (CRCs). The default is
16-bit CRCs; to enable 32-bit CRCs, you use a configuration command. For a description of the CRC function, see the “Configuring Cyclic Redundancy Checks” section on page 8-13.
The VIP2 and Catalyst RSM/VIP2 support online insertion and removal (OIR), but individual port adapters with a VIP2 or Catalyst RSM/VIP2 do not support OIR. To replace port adapters in the Cisco 7000 series and Cisco 7500 series routers, and the Catalyst 5000 series switches, you must first remove the VIP2 or Catalyst RSM/VIP2 from the chassis and then replace port adapters as required. OIR is supported for port adapters in the Cisco 7200 series and Cisco uBR7200 series routers.
PA-T3 Serial Port Adapter Features
The PA-T3 serial port adapter provides the following features:
•Single-width port adapter for the VIP2 in all Cisco 7000 series, Cisco 7100 series, Cisco 7500 series, and Cisco 7200 series routers
