Cisco Systems PA-2E3 manual Port Adapter Overview, One-Port PA-E3 Serial Port Adapter

Port Adapter Overview

Figure 1-1 One-Port PA-E3 Serial Port Adapter

ENABLED	RCVR	XMTR	RCLK FERF RL
			AIS OOF	LL

Figure 1-2 Two-Port PA-2E3 Serial Port Adapter

E3 SERIAL

H10607

ENABLED RCVR XMTR

	RCLK FERF		RL	RCLK FERF RL
AIS	OOF	LL	AIS	OOF	LL

2E3 SERIAL

RCVR XMTR

H10050

The one-port PA-E3 provides two network interfaces per VIP2 for Cisco 7000 series and

Cisco 7500 series routers and the Catalyst RSM/VIP2 for Catalyst 5000 family switches, and one high-speed interface on the Cisco 7100 series, Cisco 7200 series, and Cisco uBR7200 series routers.

The two-port PA-2E3 provides four network interfaces per VIP2 for Cisco 7000 series and

Cisco 7500 series routers and the Catalyst RSM/VIP2 for Catalyst 5000 family switches, and two high-speed interfaces on the Cisco 7100 series, 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-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 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 8-10.

Note Although the VIP2 and Catalyst RSM/VIP2 supports online insertion and removal (OIR), individual port adapters do not. To replace port adapters, you must first remove the VIP2 and Catalyst RSM/VIP2 from the chassis, and then replace port adapters as required.

The Cisco 7100 series, Cisco 7200 series, and Cisco uBR7200 series routers support the OIR of all port adapter types.

1-2PA-E3 Serial Port Adapter Installation and Configuration