90
Serial Parallel Controller User’s Guide—March 1992
D
If you have some other type of device, you will have to consult the manual for
the device to determine whether jumpering is necessary and which pins are
involved. For the signal names of the pins, see “Patch Panel Pinouts” in
Chapter 3.
Figure D-3
Null Modem Cable
Unrecognized Cables
If the Serial Parallel Controller device driver recognizes a peripheral device,
you can define it to your system. For the Serial Parallel Controller card to
communicate with devices not supported by the Serial Parallel Controller
device driver, you must inform your system about them by using the methods
described in “Printer, Terminal, and Modem Software” in your Sun System &
Network Manager’s Guide.
But first, you must select a serial cable that enables your card and the
peripheral device to communicate. Because each device is different, there is no
general rule for selecting or creating a serial cable. To obtain the correct cable,
you will need to know which serial port pins are active. The manual for your
terminal, modem, or printer should specify the active pins and what type of
signal is sent or received on each pin. It should also specify what type of cable
is required.
Also see “Patch Panel Pinouts” in Chapter 3, which identifies the active pins on
the serial ports of your patch panel. Active pins are highlighted and the type
of signal for each active pin is labeled.
DB-25
connector
DB-25
connector
2
3
4
5
6
7
8
20
2
3
8
1
1
5
6
20
7
4
Null modem cable
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