Introduction
17
Planning Aastra 400 DECT systems as of R1.0
syd-0457/1.0 – R1.0 – 10.2012
2 Introduction
The following sections take you through the planning procedure for an Aastra 400
DECT system. It contains recommendations on the project sequence and on han-
dling the measuring equipment. Unless otherwise specified, these considerations
apply to DECT radio units operated with the integrated antenna. The SB-8ANT ra-
dio unit with two external antenna connections is provided for special require-
ments or difficult topographical conditions
New planning
A wide range of subjects have to be clarified in depth with the customer before
planning a DECT system. DECT systems are very high-performing, which is why
they need to be explained in detail. The better customers are informed, the more
they will use the system’s features, which in turn means the application will be used
more efficiently.
The following points are to be observed in general:
• Radio coverage area, capacity in terms of the number of connections
• Known problem areas and what to do about them
• Handover behaviour and what happens during a handover
• Cordless groups and other features
Project extension
There are different types of extension:
• Additional cordless phones without a notable increase in traffic
– only new entries in the communication server numbering plan
• Additional cordless phones with an increase in traffic
– Entries in the communication server numbering plan
– Existing radio cells, possibly needing to be reinforced with additional radio
units (warning: radio cells become smaller, resulting in a shift in the handover
limits)
– Radio units possibly needing to be distributed to other "location areas".
• Coverage required over a greater area
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