Nortel Networks 1750 manual Hardware option cards

Appendix A Technical specifications 73

Figure 19 Modem cable (9-pin D-sub plug to RS-232-C modem plug)

10 ft

(3.05 m)

Pin 5 Pin 1

Pin 9 Pin 6

9-position D-sub receptacle with screw locks (ground shield connected to backshell)

Pin 1 Pin 13

Pin 14 Pin 25

25-position D-sub plug with screw locks (ground shield connected to backshell)

CAB0056A

The following table provides the modem cable pinouts.

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

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

Nortel VPN Router Installation — VPN Router 1750