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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 telephone base can
communicate over only a certain distance - which
can vary with the locations of the telephone
base, 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 telephone base 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
telephone base.
About cordless telephones
Privacy:
The same features that make a cordless
telephone convenient create some limitations.
Telephone calls are transmitted between the
telephone base 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 telephone base 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 telephone base 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 telephone base 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.
