Technical information, Noise, Range – BellSouth MH9915 User Manual

Page 37: Interference, Notice, Important

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Technical Information

This cordless telephone uses radio frequencies to allow mobility. There are certain
difficulties in using radio frequencies with a cordless telephone. While these are
normal, the following could affect the operation of your system.

Noise

Electrical pulse noise is present in most homes at one time or another. This noise is
most intense during electrical storms. Certain kinds of electrical equipment such as
light dimmers, fluorescent bulbs, motors, and fans also generate noise pulses.
Because radio frequencies are susceptible to these noise pulses, you may
occasionally hear them in your HANDSET. Generally they are a minor annoyance and
should not be interpreted as a defect in your system.

Range

Because radio frequency is used, the location of the BASE UNIT can affect the operating
range. Try several locations in your home or office and pick the one that gives you the
clearest signal to the HANDSET.

Interference

Electronic circuits activate a relay to connect the cordless telephone to your telephone
line. These electronic circuits operate in the radio frequency spectrum. While several
protection circuits are used to prevent unwanted signals, there may be periods when
these unwanted signals enter the BASE UNIT. You may hear clicks or hear the relay
activate while you are not using the HANDSET. If the interference occurs frequently, it can
be minimized or eliminated by relocating the BASE UNIT. You can check for interference
before selecting the final BASE UNIT location by plugging in the telephone.

NOTICE:

This cordless telephone uses radio communication between the HANDSET and the
BASE UNIT and may not ensure privacy of communication. Other devices, including
other cordless telephones, may interfere with the operation of this cordless telephone
or cause noise during operation. Units not containing coded access may be accessed
by other radio communication systems. Cordless telephones must not cause
interference to any licensed radio service.

Technical Information

30

IMPORTANT

When you hear interference, press the

button to change the operating channel.

del/chan

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