3Com 3C6090 - NETBuilder II Dual Processor Engine Router User Manual page 12

1-6 C 1: I
HAPTER NSTALLING THE
DPE M
ODULE
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 1-2 9-pin to 25-pin Terminal Cable (Null Modem-Type)
To Console port
9-pin female connector
Transmit Data
Receive Data
Request to Send
Carrier Detect
Clear to Send
Signal Ground
Data Set Ready
Data Terminal Ready
Figure 1-3 9-pin to 25-pin Modem Cable (Straight-Through-Type)
2 Connect one end of the cable to the Console port on the DPE front panel and
the other end to the serial port on the back of your console.
To Console port
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
5 4 3 2 1
9 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