General information
9
Intended use
The Octophon F640 TDM phone is a desktop unit designed for voice transmission. It can
also be used as a workstation device. Any other use is regarded as unauthorized.
Telephone type
The identification details (exact product designation and serial number) of your telephone
can be found on the nameplate at the rear of the base unit. Specific details concerning your
communications platform can be obtained from your service technician.
Please have this information ready when you contact our service department regarding
faults or problems with the product.
Speakerphone quality and display legibility
• To ensure good speakerphone quality, the area in front of the telephone (front right)
should be kept clear.
The optimum handsfree distance is 20 in. (50 cm).
• Proceed as follows to optimize display legibility:
– Turn the phone to tilt the display. This ensures you have a frontal view of the display
while eliminating light reflexes.
– Adjust the contrast as required
