Cisco Systems PA-4T manual Port Adapter Overview, C H A P T E R

C H A P T E R 1

Overview

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

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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

Port Adapter Overview

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]).

Note 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.

Figure 1-1 PA-4T+ —Faceplate View

EN

FAST SERIAL, ENHANCED

TD

TC

RD

RC

LB

CD

TD

TC

RD

RC

LB

CD

TD

TC

RD

RC

LB

CD

TD

TC

RD

RC

LB CD

H9704

Overview 1-1