US Robotics COURIER Manual de usuario descargar pdf (Pagina 65)

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U.S. Robotics I-modem Command Reference

Controlling EIA-232 Signaling • Page 6-1

Chapter 6

Controlling EIA-232 Signaling

The EIA-232

interface deals with the signals and voltages used when data is exchanged

between a computer and a serial device, such as a modem or serial printer.

While external I-modems have physical serial ports, internal I-modems have virtual serial

ports. Even though you canÕt see the internal I-modemÕs serial port, the commands

described in this chapter affect its internal serial communications.

Controlling EIA-232 Signaling

Data Terminal Ready

Your computer sends a Data Terminal Ready (DTR) signal to the I-modem when it is

ready to send and receive data (use &Dn to tell the I-modem how to deal with the DTR

signal).

1. The EIA-232 standard was formerly known as RS-232 (RS stands for Recommended Standard).

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