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USER’S GUIDE RS232 PC-FAX EXPANDER Type 185
2
2 THE RS232 CABLE CONNECTION
When the RS232 PC-FAX EXPANDER Type 185 is installed, your fax machine
can be connected like an external modem to one of your PC communication ports.
A PC usually has two communications, or serial, ports located in the back. These
ports will accept 25-pin or 9-pin connectors (the type known as DB25 or DB9).
The fax machine will use one of them. If you have a serial mouse, it may be using
the other.
A serial port must be available to connect the RS232 PC-FAX EXPANDER Type
185 to your PC.
You will need a “straight-through” shielded serial cable to connect the fax to one
of the serial ports located in the back of the PC. A shielded cable will protect the
communication in noise radiating environments. The cable can be purchased at a
local computer supply store.
One end of the cable should have a
25-pin male DB25-type
connector to plug into
the fax machine’s PC-FAX EXPANDER port. The other end should have either a
25-socket female or a 9-socket female
connector to plug into the serial port on
your PC.
It is important to examine your PC to determine which female connector you
will need for your cable.
Straight-through double-shielded cable
Note:
Do not connect or disconnect the RS232C cable while the power is on to
the connection device.
DB25 OR DB9 FEMALEDB25 MALE