Mitel 5560 IPT none Specifications download pdf (Page 84)

Engineering Guidelines

Typical operating range

Based on the building material and the number and type of obstructions within the operating

space, you can roughly calculate the coverage area for an individual Cordless Module. It is still

necessary, however, to carry out a thorough planning survey to guarantee coverage.

Typical Attenuation of building materials at 1.9 GHz (values are approximate) are listed below:

The output of a Cordless Module is determined at +20 dBm. The minimum receive field strength

is given as -83 dBm in the DECT Standard. There remains a theoretical range of approximately

100 dB. This range is dependent on a number of environmental factors and is practically reduced

to 85 dB.

Therefore the operating range in an unobstructed open space is between 100 m and 300 m

(300' to 900').

The operating range in a typical office environment will be reduced due to obstructions and

interference to approximately 50 m (150') for the Mitel Cordless (DECT) Handset and 30m

(100') for the Mitel Cordless Headset.

Range example

The radio cell can penetrate only one brick wall.

• Maximum dynamic range + 85dB

• Brick wall at customer site -12 dB

• Remaining dynamic range + 73 dB

As the open space attenuation for a radio cell length of 50 m already stands at 72 dB, the

distance of the Handset/Headset from the installed Cordless Module should be less than 50

m. Performance may vary due to building construction, office furniture and radio frequency

interference. The impact of interference and obstructions can be minimized by conducting an

RF site survey prior to installation.

Note: RF energy will travel through floors and ceilings. This can affect deployment

density and performance. When planning an installation across multiple floors,

interference from adjacent floors must be taken into account.

Inner partition walls 2-5 dB

Wood-/thin material walls 5 dB

Steel shelves/cupboards 15 dB

Various brick types 6-12 dB

Concrete walls 10-20 dB

Concrete ceilings 20 dB

Elevator cars 20-30 dB

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Mitel 5560 IPT none Specifications Page 84