Serial port to 9-pin com port on pc, Serial port to 25-pin dce port on modem, Serial port to 25-pin dte port on pc – SMC Networks Barricade SMC7004AWBR User Manual
Page 85
C
ABLES
B-5
Serial Port to 9-Pin COM Port on PC
Serial Port to 25-Pin DCE Port on Modem
Serial Port to 25-Pin DTE Port on PC
Barricade’s 9-Pin
Serial Port
CCITT Signal
PC’s 9-Pin COM
Port
1 DCD
----------- DCD ------------
1
2 RXD
<--------- TXD ------------
3
3 TXD
----------- RXD ---------->
2
4 DTR
----------- DSR ---------->
6
5 SGND
----------- SGND ----------
5
6 DSR
----------- DTR ------------
4
7 RTS
----------- CTS ----------->
8
8 CTS
<--------- RTS -------------
7
9 RI
----------- RI ---------------
9
Barricade’s 9-Pin
Serial Port
CCITT Signal
Modem’s 25-Pin
DCE Port
1
<--------- DCD ------------
8
2
<--------- RXD ------------
3
3
----------- TXD ---------->
2
4
----------- DTR ---------->
20
5
----------- SGND ----------
7
6
<--------- DSR ------------
6
7
----------- RTS ----------->
4
8
<--------- CTS -------------
5
9
<--------- RI ---------------
22
Barricade’s 9-Pin
Serial Port
Null Modem
PC’s 25-Pin DTE
Port
1 DCD
8 DCD
2 RXD
3 TXD
3 TXD
2 RXD
4 DTR
20 DTR
5 SGND
7 SGND
6 DSR
6 DSR
7 RTS
4 RTS
8 CTS
5 CTS
9 RI
22 RI
1
1
2
3
3
2
4
8
5
20
6
7
7
4
9
5
20
6