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Installation

Page 26

Connecting to a Transmission Line

The modem has a transmission line interface that can be configured for

2- or 4-wire, analog connection, where one pair is used to transmit data

(Tx and Tx) and one pair is used to receive data (Rx and Rx). Table 2-7

shows the pin numbers and corresponding signals for the modem.

Figure 2-4 shows the transmission line interface.

Note:

For communication to occur, the Rx line of one modem

must connect to the Tx line of the other modem. The

modem’s Tx/Rx pair are non-polarized.

Note:

The modem does not support leased-line operations with DC

current.

Table 2-7. Transmission Line Connector Pin Assignments

This Pin Number… Corresponds to This Signal…

1Rx

2Rx

3Tx

4Tx

1 2 ... 20 21 22 23 24 25 26 27 28 29 30 ... 43 44

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ARC DSP 9612 Guía de usuario Pagina 25