Versatile Interface Processor Installation and Configuration

VIP-4R/4T Installation and Configuration 45

VIP Port Adapter Functions

4T Port Adapter

The following sections discuss the 4T port adapter, which is shown in Figure 21.

• Synchronous Serial Overview

• 4T Port Adapter Speciﬁcations, page 47

• Serial Distance Limitations, page 48

• 4T Serial Connection Equipment, page 48

• 4T Port Adapter LEDs, page 50

• 4T Port Adapter Receptacles, Cables, and Pinouts, page 51

• Attaching 4T Port Adapter Interface Cables, page 59

• Conﬁguring the 4T Interfaces, page 60

The 4T port adapter (see Figure 21) is currently available on the VIP-4R/4T, which has two port

adapter slots: port adapter slot 0 and port adapter slot 1. The 4T port adapter, installed in port adapter

slot 1, provides up to four synchronous serial interfaces. Each serial interface allows a maximum

bandwidth of 2.048 Mbps.

Figure 21 4T Port Adapter, Faceplate View

Synchronous Serial Overview

The 4T port adapter provides four channel-independent, synchronous serial ports that support

full-duplex operation at T1 (1.544 Mbps) and E1 (2.048 Mbps) speeds. Each port supports any of

the available interface types: Electronics Industries Association/Telecommunications Industries

Association (EIA/TIA)-232, EIA/TIA-449, V.35, X.21, and EIA-530.

Note Prior to the acceptance of the EIA/TIA standards by the ANSI committee, they were referred

to as recommended standards called RS-232 and RS-449.

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