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Keyboard overlay
The keyboard overlay is a small sheet of plastic cut out to fit
over the PTC’s keyboard. Labels for the special function keys
used by your organization’s data collection program are printed
on the overlay.
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Optical coupler
On the back of the PTC-860 is a small red window. Behind the
window are five LEDs that the PTC can use to communicate
with your host computer. Instead of sending data in the form of
electronic signals through the RS-232 connector, the PTC sends
the data in the form of pulses of light to a similar coupler on an
optical communication cradle. The cradle then converts the
pulses of light into electronic signals and transmits them
directly to the host computer or over the phone lines. The
cradle can also send data to the PTC via the optical couplers.
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Screwdriver
A small screwdriver is part of the clasp on the ends of the
elastic strap. Use the screwdriver to loosen the screws holding
the battery door in place when you need to change the batteries
in the PTC-860.
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Wand port (PTC-860 only)
Optional bar-code readers plug into a wand port on the side of
the PTC-860 unit. (PTC-860ES and PTC-860NI units do not
have a wand port.) If your PTC-860 unit was ordered without a
bar-code reader, a plastic plug covers this port. Do not remove
the plastic plug except to add a bar-code reader to your
PTC-860 unit. (For instructions on how to attach a bar-code
reader to your PTC-860 unit, see
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