Nortel Networks Video Gaming Accessories 553-3001-211 Manual De Usuario

 QPC841 Quad Serial Data Interface card

Connector J1 is connected to port one, and uses the RS-232-C standard 
DB-25 pinout. Connector J2 is connected to ports two, three, and four, and is 
a non-standard pinout that requires an adapter cable. An adapter cable 
(NT8D96) splits the J2 signals out to three standard RS-232-C connectors. 
Port 2 is connected to connector A, Port 3 is connected to connector B, and 
Port 4 is connected to connector C.

Table 268 shows the pinouts for connector J1, and Table 269 on 

 

shows the pinouts for connector J2.

1

FGD

Frame ground

Frame ground

2

TD

Received data

Transmitted data

3

RD

Transmitted data

Received data

4

RTS

Request to send (not used)

Request to send (Note 2)

5

CTS

Clear to send (Note 1)

Clear to send 

6

DSR

Data set ready (Note 1)

Data set ready

7

GND

Ground

Ground

8

CD

Carrier detect (Note 1)

Carrier detect (not used)

20

DTR

Data terminal ready

Data terminal ready (Note 2)

Note 1: In DTE mode, the signals CD, DSR, and CTS are tied to +12 volts (through a resistor) 
to indicate that the QSDI port is always ready to transmit and receive data.

Note 2: In DCE mode, the signals DTR, and RTS are tied to +12 volts (through a resistor) to 
indicate that the QSDI port is always ready to transmit and receive data.