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Air Synchronization
It is necessary to establish synchronization for stable operation and handover between IP-CSs and other CSs.
As a method of synchronization, air synchronization is used.
Switching Hub
Router
IP-CS
Router
IP Network
Switching Hub
IP-CS
IP-CS
IP-CS
IP-CS
PBX
Remote Office
Remote Office
Headquarters
Headquarters
Air Synchronization is required
Air Synchronization is not required
CSs are classified into one of the following three classifications for implementing air synchronization:
CS Class
Description
Master CS1 (synchronization
source clock)
Generates clock signal.
Master CS2 (backup for
Master CS1)
Receives clock signal from Master CS1 (can also generate
clock signal if Master CS1 malfunctions).
Slave CS
Receives clock signal from other CSs.
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Quick Installation Guide
Document Version 2009-12
1 Overview