Connecting To A Modem - Brainboxes PS-307 User Manual

RS232 Port
when it it is unable to receive any more data. The sending
device reads DTR on its CTS and DCD pins. It should
stop sending when CTS goes false.
4) Connect the PSI RTS pin 4, to the PC DSR line, pin 6.
Also, connect up the PC RTS line, pin 4, to the PSI DSR
line, pin 6.
This RTS line is used to let the other device know that it
is ready for data exchange.

Connecting To A Modem.

______________________ _
If you are connecting a MODEM to the PSI BOX then
you will not need a cross over cable and a straight through cable
connecting pins 1-8 and 20 is all that is required.
Figure 5-7. The RS232 Port Pin Outs. ________________________________
___ PIN SIGNAL ______
1 GROUND
2 TxD TRANSMITTED DATA
3 RXD RECEIVED DATA
4 RTS REQUEST TO SEND
5 CTS CLEAR TO SEND
6 DSR DATA SET READY
7 GROUND
8 DCD DATA CARRIER DETECT
20 DTR DATA TERMINAL READY
9-19 NO CONNECTION
21-25 NO CONNECTION
Chapter 5
PSI BOX Reference
_________ DIRECTION
N/A
OUTPUT FROM PSI BOX
INPUT TO PSI BOX
OUTPUT FROM PSI BOX
INPUT TO PSI BOX
INPUT TO PSI BOX
N/A
INPUT TO PSI BOX
OUTPUT FROM PSI BOX
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