Multi-tech-systems MT202TD 1200 Manuel d'utilisateur télécharger pdf (Page 10)

MT202TD User Guide

Modem LED Indicators

Figure 2-2. LED Display

The MT202TD has seven diagnostic LED indicators. They are:

TD Transmit Data - This LED blinks when data is being

transmitted: on for a space; off for a mark. The state of

this LED matches the TD circuit on Pin 2 of the RS-

232C/V.24 interface.

RD Receive Data - This LED blinks when data is being

received: on for a space; off for a mark. The state of this

LED matches that of the RD circuit on Pin 3 of the RS-

232C/V.24 interface.

CD Carrier Detect - This LED lights when a valid carrier

tone has been detected.

CTS Clear to Send - This LED lights when the modem

responds to a Request to Send signal after a fixed

delay. The terminal equipment may start transmitting

data after this signal is on (high).

RTS Request to Send - This LED lights when the Request

to Send signal from the DTE is on.

DSR Data Set Ready - This LED lights when the modem is

powered on.

TM Test Mode - This LED lights when the modem is in Test

Mode.

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Multi-tech-systems MT202TD 1200 Manuel d'utilisateur Page 10