Planning
35
Planning Aastra 400 DECT systems as of R1.0
syd-0457/1.0 – R1.0 – 10.2012
DECT radio unit with outdoor supply
The following principles are to be observed when installing DECT radio units on
outdoor premises:
• Choose a central position and avoid flat penetration angles
• Ensure the chosen location is protected from the weather
• Make sure the installation site is chosen sufficiently high to be protected from
acts of vandalism
[1] A flat penetration angle results in a greater attenuation (approx. 30 dB)
[2] A steeper penetration angle results in a smaller attenuation (approx. 20 dB)
Fig. 14 Optimum positioning of the DECT radio unit on outside walls
Tip:
For outdoor supply always check the use of an external antenna
(together with an SB-8ANT) or the use of a DECT Repeater. This may result
in an optimum and therefore a more cost-effective solution.
25 cm
1 m [1]
28 cm [2]
outside wall
concrete ceiling
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