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Appendix A Technical specifications 73
Nortel VPN Router Installation — VPN Router 1750
Figure 19 Modem cable (9-pin D-sub plug to RS-232-C modem plug)
The following table provides the modem cable pinouts.
Hardware option cards
This section provides information about the option cards, including the connector
and the cable pinouts for each supported network interface card.
The VPN Router 1750 provides four peripheral component interconnect (PCI)
slots that support a combination of the following option cards:
• VPN Router Security Accelerator and Hardware Accelerator cards
Table 20 Modem cable pinouts
Nortel termination Modem termination
Signal Pin # to Pin # Signal
Data Carrier Detect 1 8 Data Carrier Detect
Transmit Data (TXD) 2 2 Transmit Data (TXD)
Receive Data (RXD) 3 3 Receive Data (RXD)
Data Set Ready 4 6 Data Set Ready
Data Terminal Ready 6 20 Data Terminal Ready
Clear to Send 7 5 Clear to Send
Request to Send 8 4 Request to Send
Pin 1Pin 5
Pin 6Pin 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)