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

Serial Port to 9-Pin COM Port on PC

Barricade's 9-Pin
Serial Port
1 DCD
2 RXD
3 TXD
4 DTR
5 SGND
6 DSR
7 RTS
8 CTS
9 RI

Serial Port to 25-Pin DCE Port on Modem

Barricade's 9-Pin
Serial Port

Serial Port to 25-Pin DTE Port on PC

Barricade's 9-Pin
Serial Port
1 DCD
2 RXD
3 TXD
4 DTR
5 SGND
6 DSR
7 RTS
8 CTS
9 RI
CCITT Signal
----------- DCD ------------
<--------- TXD ------------
----------- RXD ---------->
----------- DSR ---------->
----------- SGND ----------
----------- DTR ------------
----------- CTS ----------->
<--------- RTS -------------
----------- RI ---------------
CCITT Signal
1 <--------- DCD ------------
2 <--------- RXD ------------
3 ----------- TXD ---------->
4 ----------- DTR ---------->
5 ----------- SGND ----------
6 <--------- DSR ------------
7 ----------- RTS ----------->
8 <--------- CTS -------------
9 <--------- RI ---------------
Null Modem
1
2
3
4
5
6
7
9
20
PC's 9-Pin COM
Port
1
3
2
6
5
4
8
7
9
Modem's 25-Pin
DCE Port
8
3
2
20
7
6
4
5
22
PC's 25-Pin DTE
Port
8 DCD
1
3 TXD
3
2 2 RXD
8 20 DTR
20
7 SGND
7
6 DSR
4
4 RTS
5
5 CTS
6
22 RI
C
ABLES
B-5