Nortel Networks 1750 Manual Do Utilizador
72 Appendix A Technical specifications
NN46110-316 03.01
Figure 18 Modem cable (9-pin D-sub plug to RS-232-C modem plug)
The following table provides the multiple DB9 and DB25 serial interface cable
pinouts.
pinouts.
Modem cable specifications
If you need to connect a modem to a VPN Router 1750, you must obtain an
appropriate modem cable. The modem cable must have a 9-pin D-sub plug that
connects to the VPN Router 1750 serial port and a 25-pin D-sub plug that
connects to the RS-232-C modem port.
appropriate modem cable. The modem cable must have a 9-pin D-sub plug that
connects to the VPN Router 1750 serial port and a 25-pin D-sub plug that
connects to the RS-232-C modem port.
shows the cable ends.
Table 19 Multiple DB9 and DB25 connector pinouts
Serial port
DB9 connector
DB9 connector
Serial port
DB25 connector
DB25 connector
Serial port
DB25 connector
DB25 connector
Serial port
DB9 connector
DB9 connector
Pinout
Signal
Pinout
Signal
Pinout
Signal
Pinout
Signal
2
RXD
3
TXD
>
2
RXD
3
TXD
3
TXD
2
RXD
>
3
TXD
2
RXD
4
DTR
20
DSR
>
6
DTR
6
DSR
5
Ground
7
Ground
>
7
Ground
5
Ground
6
DSR
6
DTR
>
20
DSR
4
DTR
7
RTS
4
RTS
>
5
CTS
8
CTS
8
CTS
5
CTS
>
4
RTS
7
RTS
Pin 1
Pin 5
Pin 6
Pin 9
10 ft
(3.05 m)
9-position D-sub receptacle with screw locks
(ground shield connected to backshell)
CAB0056A
Pin 13
Pin 1
Pin 25
Pin 14
25-position D-sub plug with screw locks
(ground shield connected to backshell)