I n s t a l l a t i o n & P r o g r a m m i n g M a n u a l
54
Extension 14 is suitable for external wiring and is fitted with the required protection circuitry.
Figure 4-3 below, shows the terminal layout.
Figure 4-3 MDF connections
Extension wiring
To eliminate cross-talk, it is a requirement that twisted pair cable must be used to support
all extensions and system integral devices with only one extension per cable. Four-wire
cable must be used.
If an ordinary telephone is connected to an extension which previously had a Terminal connected,
the system needs to be told that the Terminal is no longer connected. Ringing will not be heard at the
extension until this has been done, though dialling will still be possible. After plugging in the SLT, go
off-hook and enter the code *750 ext #.
Important!
Important!
Po
wer
fa
il c
onnec
ti
ons
(
PST
N
o
nl
y)
Paging port
Door 2 latch relay
Door phone 2 (option)
Not used
2
1
Door phone 1
Door 1 latch relay
24
23
22
21
18
17
16
15
14
13
12
11
1
2
3
4
5
6
Terminal Signalling (4 pairs in parallel)
Dr
Rl
y_
Dr
1v
C
O
4__C
O3
-T
x+
-R
x+
C
O
2__C
O1
Pf
ail Pf
ail
Ex
t11_E
xt
12
Ex
t13_E
xt
14
Ex
t15_E
xt
16
Ex
t17_E
xt
18
Pf
ail
Ex
t21_E
xt
22
Pf
ail
Ex
t23_E
xt
24
C
O
6__C
O5
-T
x+
-R
x+
Te
rS
ig1_S
ig2 A
ux
Si
g1_S
ig2
D
r2v
_P
age
Al
m
1_A
lm
2
Al
m
3_A
lm
4
AlmR
ly
C N
C
C N
O
Ex
te
ns
io
ns
M
is
cel
la
neo
us
Ex
cha
ng
e L
ines
Al
arms
Alarm Loops
Expansion slot 1
Expansion slot 2
Basic system
Expansion slot 2 ISDN or PSTN
Expansion slot 1 ISDN or PSTN
Basic system
