S e c t i o n 4 - I n s t a l l a t i o n
65
Figure 4-3 MDF connections – 206 system
Alarm loop 1 or door phone diversion activation switch
Paging amplifier output V
Executive / Standard Terminal signalling
(3 pairs, same connections)
Door phone
Extension 18
Extension 16
Extension 13
Extension 12 (Master programming extension)
PSTN Line 1
PSTN Line 2 or ISDN
PSTN Line 3 or ISDN
Alarm loop 2 or day/night switch
6
V
V
TX-
TX+
RX-
RX+
ISDN Connecti
ons
1
2
S
HYB
R
7
8
3
4
1
2
2
1
V
3
HYB
d c
d c
d c
a b
a b
a b
a b
a b
a b
a b
a b
Door latch relay
Extension 17 (Power fail, PSTN line 3)
Extension 15 (Power fail, PSTN line 2)
Extension 14
Extension 11 (Power fail, PSTN line 1)
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