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Private
Network
Router
Switch
Router
Router
Router
SwitchSwitch
LAN LAN
LAN LAN
LAN
LAN
Co
Line
IP-Phone
IP-Phone
IP-Phone
IP-Phone
KX-TCA355
IP-Phone
Co
Line
Co
Line
LANIP-Phone
IP-Phone
IP-Phone
IP-Phone
IP-Phone
Other factory
PC
SIP-Phone
IP-PBX
Diagram By
IP-Phone
This system’s Extension number
100,~199,200~299
This system’s Extension number
300,~399,400~499
This system’s Extension number
500~599,600~699
IP-Phone
Other factory

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