28 Site planning
Figure 5
DAP radio signal synchronization
Due to the cellular structure of a DECT radio network, there must
always be overlap in the cells with sufficient voice quality. The wider
cell limit around the DAP therefore has some overlap with the other cell
and reaches to the radio of the other cell. Therefore, the DAPs of the
overlapping cells exchange radio signals with each other. These radio
signals are weak relative the signal needed by the handsets, but are still
strong enough for synchronization purposes.
ATTENTION
For signal strength calculation see “Coverage and signal strength calculation”
(page 37).
If one DAP receives a signal from another, the receiving DAP checks the
radio signals on Primary Access Right Identity (PARI), to ensure that the
signals belong to the same DECT system. If the signals belong to the
same DECT system, the DAPs synchronize with each other according to
predefined rules.
Nortel Communication Server 1000
SIP DECT Fundamentals
NN43120-123 01.07
6 January 2009
Copyright © 2008-2009 Nortel Networks
.
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