IBM ThinkPad 760C, Service Manual

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Communicating with the Infrared Port
Communication can be affected by the light from the LCD on the
computer. To avoid this, open the LCD to a wide angle:
[Side view]
Considerations for Communication
Consider the following points when communicating with the infrared
ports:
You need to run the same communication application on both
computers to communicate between your computer and another
computer device. Refer to the application manuals for more
information.
Run only one communication application at a time that uses the
infrared ports.
When using applications that use a conventional serial port and
serial cable to exchange data, your computer infrared ports are
used as a replacement for the serial port and cable. In this case,
ThinkPad mode cannot be used.
The communicating distance might need to be less if:
– The other system is not the same model as your computer.
– There is interference from ambient light. It is recommended
that you do not use infrared communication in bright
sunshine or artificial light conditions.
– The infrared port is not directly facing the other
communicating port.
Headphones may interfere with infrared communications. You
might hear noise through the headphones, or the computer might
not be able to communicate with other devices through the
infrared port.
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IBM ThinkPad 760C User's Guide