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CHAPTER
Overview 1-1
1
Overview
This chapter describes the one-port PA-E3 and two-port PA-2E3 E3 serial port adapters. This
chapter contains the following sections:
• Port Adapter Overview, page 1-1
• PA-E3 Serial Port Adapter Features, page 1-2
• Management Information Base, page 1-3
• PA-E3 Port Adapter LEDs, page 1-3
• PA-E3 Receptacles and Cables, page 1-4
• Interoperability Guidelines for PA-E3 DSUs, page 1-5
Port Adapter Overview
The PA-E3 is a single-width, one-port or two-port module that integrates data service unit (DSU)
functionality into the Cisco router (see Figure 1-1 and Figure 1-2). The module provides one or two
high-speed serial E3 interfaces on:
• Cisco 7100 series routers
• Cisco 7200 series routers
• Cisco uBR7200 series routers
• Second-generation Versatile Interface Processors (VIP2) inall Cisco 7000 series andCisco 7500
series routers
• Catalyst RSM/VIP2 in the Catalyst 5000 family switches
Note Port adapters have a handle attached, but this handle is occasionally not shown in figures in
this publication to allow a full view of detail on the port adapter’s faceplate.