2.1 Basic System Construction
2.1.1 System Configurations
Main Unit
The main unit contains a mother board for controlling the Control Box's operation.
2.1.2 System configuration
Support up to 2000 SIP devices
on a system with a Control Box (example 1)
R1 R2 R3
1
2
R1 R2 R3
1
2
<Gate>
<Reception / Guard>
VL-VN1800
Control box
Smartphone
*3
Router
Internet
Internet
Public
IP address
*2
Mobile
network
Push
server
F
A
B
C
N
G
D
H
I
J
K
M
L
E
E
*3
E
*3
2.1 Basic System Construction
20
Installation Manual