Installation
131
Mitel SMB Controller
syd-0657/2.0 – R6.0 – 09.2018
Fig. 48
S bus, point-to-point
Greater distances (up to 8km) can be achieved using a standard commercial S bus ex-
tension.
Restrictions
The maximum number of terminals per S bus is further restricted by the power require-
ments of the terminals and their supplementary equipment:
Tab. 55
Power balance on the S bus
The number of terminals is the sum of the power requirements of the individual termi-
nals and the power available on the S bus.
Connection sockets
Fig. 49
RJ45 connection, single socket
Power available [W]
S bus short
5
1)
1) These values are based on a wire diameter of 0.5 mm.
S bus, long
3.5
max. 1000 m
2 x 100
Ω
Communi-
cation
server
Connection
point
8
7
6
5
4
3
2
1
c
f
e
d
a
b
c
f
e
d
g
h
1
2
3
4
5
6
7
8
100
Ω
100
Ω
Fit resistors at bus extremity only
Front view of
RJ45
RJ45, 8-pin
