Panasonic KX-NCP0158 Quick Installation Manual page 18

3 Site Planning
CS Classifications
CSs are assigned to any one of the following three classifications for implementing air synchronization:
CS Class
Master CS1 (synchronization
source clock)
Master CS2 (backup for
Master CS1)
Slave CS
Synchronization Hierarchy
Air synchronization has a hierarchical structure with a Master CS1 at the top. Therefore, it is necessary to
conduct the site survey with extreme care to ensure stable synchronization since one disruption of the radio
link could loss of service to a wide area.
Master CS1
(Master Clock Signal)
Slave CSs
Search Order (Primary/Secondary)
The search order used for synchronizing CSs must be set. If the CS cannot synchronize with the Primary CS
for some reason, it will try to synchronize with the Secondary CS.
CS Class
Master CS1
Master CS2
Slave CS
For example, if synchronization is completely lost by malfunction of the Master CS etc., handover will not work
and ongoing calls will be disconnected after a while. In addition, new calls cannot be made or received.
Therefore, it is recommended to not only assign the Primary CS but also the Secondary CS as an alternative
source for synchronizing CSs.
Conditions for Configuring the Air Synchronization
•
Master CS2 must be within range of Master CS1.
•
It is recommended that Master CSs be placed in the middle of the installation site.
•
Both the Primary CS and Secondary CS should be assigned Slave CSs.
•
All traditional CSs are automatically assigned and fixed as Master CS1.
•
When using IP-CSs and traditional CSs in the same area, make sure that you do not create a Master CS2.
18 Quick Installation Guide
Generates clock signal.
Receives clock signal from Master CS1 (can also generate
clock signal if Master CS1 malfunctions).
Receives clock signal from other CSs.
Master CS2
Slave CS
Primary CS
None
Master CS1
Master CS1, Master CS2, or Slave
CS
Description
Master CS1
(Master Clock Signal)
Radio Link Loss
CSs stop working
Slave CSs
Secondary CS
None
None
Master CS1, Master CS2, Slave
CS, or None
Master CS2
Slave CS
Document Version 2009-06