Sharp O2 - Manual (Page 113)

Data Transmission 112
• When using the infrared modem function for
executing data transmission, align the infrared port
with each other.
Note
• The distance between the infrared ports which can
communicate is a maximum of 20 cm within a 30°
angle.
• When transmitting data via infrared communication,
you need to set the infrared setting to “On”. (p. 89)
• It is not recommended that you make or answer a call
during data transmission. The operation may be
interrupted.