30 Site planning
Figure 6
DAP synchronization hierarchy
If more than one synchronization source is present, each one forms a
separate hierarchy of DAPs called a synchronization island.
Automatic synchronization is performed within each synchronization island
using the following rules.
• After a DAP starts, it searches for existing DAPs. If it finds one with a
lower RPN, it synchronizes with it. If no other DAP exists with a lower
RPN, the new DAP becomes the synchronization source.
ATTENTION
It is possible that extra DAPs are required to establish a synchronization
path.
• If a DAP detects more than one other DAP, it synchronizes with the
DAP that has the shortest path to the synchronization master. If two
or more DAPs have the same path length separating them from the
master, the new DAP synchronizes to the DAP with the lowest RPN.
ATTENTION
After you install the SIP DECT system, wait at least fifteen minutes until you see
the results of the automatic synchronization.
If you want to make a DAP a synchronization master, or give a DAP a
higher position in the synchronization structure, you can assign a lower
RPN number to a DAP manually. RPNs can be assigned manually using
Nortel Communication Server 1000
SIP DECT Fundamentals
NN43120-123 01.07
6 January 2009
Copyright © 2008-2009 Nortel Networks
.
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