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PA-T3 Serial Port Adapter Features
PA-T3 Serial Port Adapter Installation and Configuration
1-2
Figure 1-2 Two-Port PA-2T3 Serial Port Adapter
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—Portadapter slot 1 and slot 2of the Cisco uBR7246; portadapter
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; toenable 32-bit CRCs,you use a configurationcommand. For adescription of theCRC
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 seriesand Cisco 7500 seriesrouters, and the Catalyst 5000series switches, you mustfirst
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
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