Cisco Systems PA-4T Manual De Usuario

 Overview 1-1

Overview

This chapter describes the PA-4T+ port adapter and describes its LEDs, cables, and receptacles. This
chapter contains the following sections:

•

Port Adapter Overview, page 1-1

•

Synchronous Serial Overview, page 1-3

•

Serial Interface Specifications, page 1-4

•

Cables and Pinouts, page 1-5

•

LEDs, page 1-15

The PA-4T+ provides the following electrical interfaces: EIA/TIA-232, EIA/TIA-449, EIA-530.
X.21, and V.35. Each interface complies with its specific interface specifications. The cable attached
to each PA-4T+ port adapter’s interface ports determines its type (EIA/TIA-232, and so forth) and
its mode (data communications equipment [DCE] or data terminal equipment [DTE]).

The PA-4T+ provides enhanced performance over the PA-4T. To determine if a PA-4T+ or

PA-4T is installed in your router, view the port adapters’ faceplate labels (refer to Figure 1-1 and
Figure 1-2, respectively) or use the show diag command to view installed interface types.

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