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:
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
| | | | | | | | | | | | | | | | | | 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 |
