Terminal Cable; Modem Cable - 3Com NETBuilder SI Using Manual

164 A D: C
PPENDIX ONNECTORS AND

Terminal Cable

Modem Cable

C
ABLES
Figure 18 shows the pinouts for a 9-pin female to 25-pin
null modem-type cable.
Figure 18 9-pin to 25-pin Terminal Cable (Null Modem-Type)
To Console port
9-pin female connector
Receive Data
Transmit Data
Carrier Detect
Clear to Send
Request to Send
Signal Ground
Data Terminal Ready
Data Set Ready
Figure 19 shows the pinouts for a 9-pin female to 25-pin male
straight-through-type cable.
Figure 19 9-pin to 25-pin Modem Cable (Straight-Through-Type)
To Console port
5
9
9-pin female connector
Transmit Data
Receive Data
Request to Send
Carrier Detect
Clear to Send
Signal Ground
Data Set Ready
Data Terminal Ready
5 4 3 2 1
9 8 7 6
Name Abbr Pin
RxD
2
TxD
3
CD
1
CTS
8
RTS
7
GND
5
DTR
4
DSR
6
4 3 2 1
8 7 6
Name Abbr Pin
TxD 3
RxD 2
RTS 7
CD 1
CTS 8
GND 5
DSR 6
DTR 4
To terminal
1 2 3 4 5 6 7 8 9 10 11 12 13
14 15 16 17 18 19 20 21 22 23 24 25
25-pin male or female connector
Pin Abbr Name
TxD
Transmit Data
2
RxD Receive Data
3
RTS
Request to Send
4
CTS
Clear to Send
5
CD
Carrier Detect
8
GND
Signal Ground
7
DSR Data Set Ready
6
DTR
Data Terminal Ready
20
To modem
1 2 3 4 5 6 7 8 9 10 11 12 13
14 15 16 17 18 19 20 21 22 23 24 25
25-pin male connector
Pin Abbr Name
2 TxD Transmit Data
3 RxD Receive Data
4 RTS Request to Send
8 CD Carrier Detect
5 CTS Clear to Send
7 GND Signal Ground
6 DSR Data Set Ready
20 DTR Data Terminal Ready