Nortel CS 1000 Manual page 37

The range in the air is 80 m from the DAP, for optimal communication
quality. The result of this coverage calculation is a map with possible DAP
positions indicated.
Use the following DAP ranges as a rough guide for planning the DAP
positions:
•
In the line of sights the DAP has a range of approximately 80 m.
•
In halls the DAP has a range less than 80 m.
•
In buildings the DAP has a range of 15 to 40 m. This is based on the
assumption that walls are made of light brick, plasterboard or wallboard
with metal frames. Normal electrical wiring, central heating pipes, office
furniture and desktop computer equipment have no significant effect.
Ensure that you consider the signal shadowing effect of stairways, lift
shafts, and shielded rooms.
The following items cause shadowing of the radio signal:
•
Thick walls, especially cavity walls and reinforced concrete walls.
•
Windows or glass in doors with steel wire reinforcement or metallic
reflection film.
•
Steel doors, partitions, or walls.
•
Fire resistant doors.
•
A wall of steel cabinets, large computer equipment or machinery.
•
Thick concrete floors.
During the site survey, be aware of the following:
•
Choose a corridor or other large open space rather than an enclosed
area so that the radio signal passes through as few walls as possible
to reach as large an area as possible.
•
Radio reception inside a vehicle is poor unless the user is close to the
DAP.
•
Ensure that the DAP is placed high enough to be unaffected by
surrounding objects. For example, a DAP in a car park needs to be
placed higher than a vehicle that is parked next to it.
•
Ensure that DAPs are separated by at least 1 meter.
•
The presence of another unsynchronised DECT System, or any similar
system in adjacent buildings, causes interference.
Nortel Communication Server 1000
SIP DECT Fundamentals
NN43120-123 02.02 30 March 2010
Copyright © 2008-2010 Nortel Networks. All Rights Reserved.
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