5
Q u i c k R e f e r e n c e
Data Communications
Connecting to an External Device by Serial Cable
An SPT 1700 or PPT 2700 provides a serial port at the bottom of
the terminal. When you insert a terminal into the vehicle cradle, it
connects to the cradle’s serial port. The terminal can then use the
cradle’s serial port to communicate with an external device.
The external device must use an RS-232 serial connection limited
to GND, DSR, DTR, TXD, RXD, RTS and CTS data lines. It must
also have its own power supply, as the cradle’s serial port does not
provide power.
To set up communications:
1. Plug a 9-pin serial cable (female) into the serial port located
next to the power port at the bottom of the cradle. Note that
some devices may require the serial cable to be a null mo-
dem cable. The data cable is not provided, and can be ob-
