user manual

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2
B
A
C
1
7
R
Q
P
S
0
3
E
D
F
4
H
G
I
5
K
J
L
6
N
M
O
8
U
T
V
9
Y
X
W
Z
2
B
A
C
3
E
D
F
5
K
J
L
8
U
T
V
4
H
G
I
6
N
M
O
1
0
9
Y
X
W
Z
7
R
Q
P
S
2
B
A
C
1
7
R
Q
P
S
0
3
E
D
F
4
H
G
I
5
K
J
L
6
N
M
O
8
U
T
V
9
Y
X
W
Z
2
B
A
C
3
E
D
F
5
K
J
L
8
U
T
V
4
H
G
I
6
N
M
O
1
0
9
Y
X
W
Z
7
R
Q
P
S
PS24
PS24
PS24 PS24
PS24 PS24
PS24
PS24
PS24
[1]
[1]
[1]
[2]
[3] [4]
[5][6]
[8]
[8]
[8]
[9]
[10] [11]
[10] [11]
[12] [13]
[14]
[15]
[16]
[17]
[18]
[19]
[20]
[6] [5]
GT-VBC GT-BC
GT-BC
GT-BCXGT-VBX
GT-MK
GT-MK
GT-VBC
GT-BC
*
*
[9]
Standard system Expanded system
Each residence (with recording function)
Entrance station
Entrance station
Each
residence
Each
residence
Each
residence
DP
DP
DP
Each
residence
Wiring distance1-4
EXP STD
EXP STD
EXP STD
SW2
SW2
SW2
PS24
PS24
PS24
[7]
[7]
[7]
GT-VBX
GT-VBC
GT-VBC
GT-VBC
PS24
PS24
GT-VBC
GT-VBC
*
The GT-VBC can be used as an extension adaptor as well (2
units per trunk line).
To do so, set the setting switch (SW2) to "EXP".
Use the unit as an extension adaptor in expanded systems.
Even if two units are used as extension adaptors (SW2:
EXP), the wiring distance to the farthest residential station
from the GT-VBC (SW2: STD) or GT-VBX is limited to 300 m.
Each
residence
300 m
Standard system Expanded system
Each
residence