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Cisco Wireless IP Phone 8821 and 8821-EX Wireless LAN Deployment Guide
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Certification ensures that the equipment is fit for its intended purpose and that adequate information is supplied with it to ensure
that it can be used safely.
Canadian Standards Association (CSA) Class I Division 2
Laws and regulations in most municipalities, states, and provinces in North America require certain products to be tested to a
specific standard or group of standards when they are to be classified safe when used in an explosive environment.
In North America, hazardous locations have traditionally been defined by the following combination of Class and Division:
•
Class I - A location where a quantity of flammable gas or vapor, sufficient to produce an explosive or ignitable
mixture, may be present in the air.
•
Class II - A location made hazardous by the presence of combustible elements.
•
Class III - A location made hazardous by the presence of easily ignitable fibers in the air.
•
Division 1 - A location where a classified hazard is likely to exist.
•
Division 2 - A location where a classified hazard does not normally exist but is possible under abnormal conditions.
More recently in North America, for Class I hazards, locations can be classified under the zone system as defined by the
IEC/ATEX mentioned below.
Atmospheres Explosibles (ATEX) Class I Zone 2
Equipment and protective systems intended for use in potentially explosive atmospheres must comply with ATEX Directive
94/9/EC .
Areas classified into zones must be protected from effective sources of ignition.
Locations where explosive gas atmospheres are likely to be present are divided into IEC/EU-defined Zones (Class I Zone 0, 1, 2
for locations with flammable gases or vapors and Class II Zone 20, 21, 22 for locations with combustible dust or ignitable
fibers).
Class I
•
Zone 0 - An area in which an explosive gas atmosphere is continuously present or present for long periods.
•
Zone 1 - An area in which an explosive gas atmosphere is likely to occur in normal operation.
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Zone 2 - An area in which an explosive gas atmosphere does not normally exist, or if they do occur, will exist only for
a short period of time.
Class II
•
Zone 20 – An area in which an ignitable concentrations of combustible dust or ignitable fibers/flyings are present
continuously or for long periods of time under normal operating conditions.
•
Zone 21 - An area in which an ignitable concentrations of combustible dust or ignitable fibers/flyings are likely to exist
under normal operating conditions.
•
Zone 22 - An area in which an ignitable concentrations of combustible dust or ignitable fibers/flyings are not likely to
exist under normal operating conditions.
Battery Life
The Cisco Wireless IP Phone 8821 and 8821-EX have a 2060 mAh smart battery.
The Cisco Wireless IP Phone 8821 and 8821-EX battery’s capacity will be reduced to 80% after 500 full charging cycles
(charging from empty to full).
Expected battery life time depends on