coMsat Multichannel PRA
coMsat Multichannel PRA
coMsat Multichannel PRA
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<strong>Multichannel</strong> <strong>PRA</strong><br />
This process must not be interrupted by messages from the <strong>Multichannel</strong> <strong>PRA</strong>. For<br />
that, the RxD (Received Data, coming from <strong>Multichannel</strong> <strong>PRA</strong>) signal must be<br />
controlled by the DCD (Data Carrier Detect, coming from the modem) signal. This is<br />
done with a resistor and a diode to have TxD of the modem pulled down (low<br />
voltage) as long as DCD is down (low voltage):<br />
Modem <strong>PRA</strong><br />
TxD (3)<br />
DCD (1)<br />
RxD (2)<br />
Figure 82: Remote servicing via analog modem<br />
Modem <strong>PRA</strong><br />
Signal Name DB-9 Pin DB-9 Pin Signal<br />
DCD (Data Carrier Detect, Out) 1 *<br />
TxD (Transmit Data, In) 3 * 2 RxD (Out)<br />
RxD (Receive Data, Out) 2 3 TxD (In)<br />
RTS (Request To Send, In) 7 8 CTS (Out)<br />
CTS (Clear To Send, Out) 8 7 RTS (In)<br />
SG (Signal Ground) 5 5 SG<br />
*=see auto answer considerations<br />
Dial settings<br />
To connect to the <strong>PRA</strong> use the menu command “Connection”/“Remote Login”.<br />
Set the Contact Mode to “Call directly” and give the number of the analog modem 2<br />
in the field “Number of <strong>PRA</strong> to connect to”:<br />
Figure 83: Remote servicing using analog modem<br />
date: page: file:<br />
15.02.2008 10:32 100 Manual <strong>coMsat</strong> <strong>Multichannel</strong> <strong>PRA</strong> 3-3 eng.doc<br />
Note Protection Mark according to DIN 34!
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