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Appendix
Precautions for users of implanted
cardiac pacemakers
Cardiac pacemakers (applies only to digital
cordless telephones):
Wireless Technology Research, LLC (WTR),
an independent research entity, led a
multidisciplinary evaluation of the interference
between portable wireless telephones and
implanted cardiac pacemakers. Supported by
the U.S. Food and Drug Administration, WTR
recommends to physicians that:
Pacemaker patients
• Should keep wireless telephones at least six
inches from the pacemaker.
• Should NOT place wireless telephones
directly over the pacemaker, such as in a
breast pocket, when it is turned ON.
• Should use the wireless telephone at the
ear opposite the pacemaker.
WTR’s evaluation did not identify any risk
to bystanders with pacemakers from other
persons using wireless telephones.
Operating range
The cordless telephone operates with the
maximum power allowed by the Federal
Communications Commission (FCC). Even so,
the cordless handset and base station can
communicate over only a certain distance -
which can vary with the locations of the base
station, cordless handset, the weather, and the
layout of the hotel.
When the cordless handset is out of range
while on a call, the cordless handset rapidly
beeps three times.
If there is a call while the handset is out of
range, it may not ring, or if it does ring, the call
may not connect well when you answer the
call. Move closer to the base station to answer
the call.
If the handset moves out of range during
a telephone conversation, there may be
interference.
To improve reception, move closer to the base
station.
About cordless telephones
Privacy: The same features that make a
cordless telephone convenient create some
limitations. Telephone calls are transmitted
between the base station and the cordless
handset by radio waves, so there is a
possibility that the cordless telephone
conversations could be intercepted by radio
receiving equipment within range of the
cordless handset. For this reason, you should
not think of cordless telephone conversations
as being as private as those on corded
telephones.
Electrical power: The base station of the
cordless telephone must be connected to a
working electrical outlet. The electrical outlet
should not be controlled by a wall switch. Calls
cannot be made from the cordless handset if
the base station is unplugged, switched off or if
the electrical power is interrupted.
Potential TV interference: Some cordless
telephones operate at frequencies that may
cause interference to televisions and VCRs.
To minimize or prevent such interference, do
not place the base station of the cordless
telephone near or on top of a TV or VCR.
If interference is experienced, moving the
cordless telephone farther away from the
TV or VCR often reduces or eliminates the
interference.
Rechargeable batteries: Exercise care in
handling batteries in order not to create a
short circuit with conducting material such
as rings, bracelets and keys. The battery or
conductor may overheat and cause harm.
Observe proper polarity between the battery
and the battery charger.
