Comtrol Building Custom Cables - Manual (Page 3)

Building Custom Cables 3
Building Custom Cables
DTE to DTE Data-Only Null Modem Cables
If no hardware flow is needed, use the following figure. With a 3-wire
cable, software flow control must be used, if control is needed.
DTE to DTE Control Loop-Back Cables
Some equipment may not require hardware handshaking, but may
require that certain control signals are active before sending data.
RocketPort Connector
Signal
TxD
RxD
RTS
CTS
DSR
GND
DCD
DTR
Name
DB25
2
3
4
5
6
7
8
20
Signal
RxD
TxD
CTS
RTS
DTR
GND
DCD
DSR
Name Pins
DB9
2
3
8
7
4
5
1
6
Pins
DB25
3
2
5
4
20
7
8
6
Pins
Remote Connector
RJ45
4
5
1
8
7
3
6
2
Pins
RJ11 DB9
3 3
4 2
N/A 7
N/A 8
N/A 6
2 5
5 1
1 4
Pins Pins
RocketPort Connector
Signal
TxD
RxD
GND
Name
DB25
2
3
7
Signal
RxD
TxD
GND
Name Pins
DB9
2
3
5
Pins
DB25
3
2
7
Pins
Remote Connector
RJ45
4
5
3
Pins
RJ11 DB9
3 3
4 2
2 5
Pins Pins
RocketPort Connector
Signal
TxD
RxD
RTS
CTS
DSR
GND
DCD
DTR
Name
DB25
2
3
4
5
6
7
8
20
Signal
RxD
TxD
RTS
CTS
DSR
GND
DCD
DTR
Name Pins
DB9
2
3
7
8
6
5
1
4
Pins
DB25
3
2
4
5
6
7
8
20
Pins
Remote Connector
RJ45
4
5
1
8
7
3
6
2
Pins
RJ11 DB9
3 3
4 2
N/A 7
N/A 8
N/A 6
2 5
5 1
1 4
Pins Pins