Pub. 42004-464D
VoIP Electronic Paging Modules—Wired and WiFi Page 4 of 20
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Operational Cautions
HospitalsorHealthCareFacilities
To avoid electromagnetic interference and/or compatibility conflicts, turn off the radio in any facility
where posted notices instruct you to do so. Hospital or health care facilities may be using equipment that
is sensitive to external RF energy.
Aircraft/Airports
Airports may be using equipment that is sensitive to external RF energy. Any use of a radio must be in
accordance with applicable regulations.
Medical Devices—Pacemakers
These recommendations are consistent with the independent research by, and recommendations of the
U.S. Food and Drug Administration. Persons with pacemakers should:
•ALWAYS keep the radio more than six inches (15 cm) from a pacemaker when the radio is turned
ON.
•Do NOT carry the radio in the breast pocket.
•Turn the radio OFF immediately if there is any reason to suspect that interference is taking place.
BlastingCapsandAreas
To avoid possible interference with blasting operations, turn off the radio near electrical blasting caps, in
a blasting area, or in areas posted: Turn off two-way radios. Obey all signs and instructions.
Safe Handling of CMOS Integrated Circuit Devices
Many of the integrated circuit devices used in communications equipment are of the Complementary
Metal Oxide Semiconductor (CMOS) type. Because of their high open circuit impedance, CMOS
integrated circuits are vulnerable to damage from static charges. Care must be taken handling, shipping,
and servicing them and the assemblies in which they are used.
Even though protection devices are provided in CMOS integrated circuit inputs, the protection is effective
only against overvoltage in the hundreds of volts range such as is encountered in an operating system. In
a system, circuit elements distribute static charges and load the CMOS circuits, decreasing the chance of
damage. However, CMOS circuits can be damaged by improper handling of the modules, even in a
system.
To avoid damage to circuits, observe the following handling, shipping, and servicing precautions:
•Prior to and while servicing a circuit module, particularly after moving within the service area,
momentarily touch both hands to a bare metal, earth-grounded surface. This will discharge any static
charge that may have accumulated on the person doing the servicing.
NOTE:Wearing a conductive wrist strap will minimize static build-up during servicing.
•Whenever possible, avoid touching any electrically conductive parts of the circuit module with your
hands.
•Power down the unit before installing or removing the circuit module.
•When servicing a circuit module, avoid carpeted areas, dry environments, and certain types of
clothing (silk, nylon, etc.) because they contribute to static build-up. Similarly, disconnect the test
probe prior to removing the ground lead.
