1-2
PA-E3 Serial Port Adapter Installation and Configuration
OL-3502-04
Chapter 1 Overview
Port Adapter Overview
Figure 1-2
Two-Port PA-2E3 Serial Port Adapter
The one-port PA-E3 provides up to two network interfaces per Catalyst RSM/VIP2 for the Catalyst 5000
family switches, Catalyst 6000 family FlexWAN module in the Catalyst 6000 family switches, and VIP
for Cisco 7000 series and Cisco 7500 series routers, and one high-speed interface on the Cisco 7100
series routers, Cisco 7200 series routers, Cisco 7200 VXR routers, Cisco uBR7200 series routers, the
Cisco 7201 router, the Cisco 7301 router, the Cisco 7401ASR router
,
and the Cisco 7304 PCI Port
Adapter Carrier Card in the Cisco 7304 router.
The two-port PA-2E3 provides up to four network interfaces per Catalyst RSM/VIP2 for the Catalyst
5000 family switches, Catalyst 6000 family FlexWAN module in the Catalyst 6000 family switches, and
VIP for Cisco 7000 series and Cisco 7500 series routers, and two high-speed interfaces on the Cisco
7100 series routers, Cisco 7200 series routers, Cisco 7200 VXR routers, Cisco uBR7200 series routers,
Cisco 7201 router, Cisco 7301 router, Cisco 7401ASR router, and Cisco 7304 PCI Port Adapter Carrier
Card in the Cisco 7304 router.
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-E3 provides a full-duplex
synchronous serial E3 interface for transmitting and receiving data at rates of up to 34 megabits per
second (Mbps).
The port adapters both 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 4-10
Note
The Catalyst RSM/VIP2, the Catalyst 6000 family FlexWAN module, the VIP, and the Cisco 7304 PCI
Port Adapter Carrier Card support online insertion and removal (OIR), but individual port adapters do
not. To replace port adapters, you must first remove the Catalyst RSM/VIP2, the Catalyst 6000 family
FlexWAN module, the VIP, or the Cisco 7304 PCI Port Adapter Carrier Card from the chassis and then
replace port adapters as required.
OIR is supported for port adapters in the Cisco 7100 series routers, Cisco 7200 series routers,
Cisco 7200 VXR routers, Cisco uBR7200 series routers, Cisco 7201 router, Cisco 7301 router, and
Cisco 7401ASR router.
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