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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.
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