Aastra 415 System Manual page 123

2 x 100 Ω
Fig. 47 S bus, short, V-shaped
Communica-
tion server
Fig. 48 S bus, long
Communi-
cation
server
Fig. 49 S bus, point-to-point
Greater distances (up to 8km) can be achieved using a standard commercial S bus
extension.
Restrictions
The maximum number of terminals per S bus is further restricted by the power re-
quirements of the terminals and their supplementary equipment:
Tab. 56 Power balance on the S bus
S bus short
S bus, long
1)
These values are based on a wire diameter of 0.5 mm.
Aastra 415/430 as of R3.2
syd-0344/1.6 – R3.2 – 09.2014
1. 2. 3.
max. 150 m
1.
max. 500 m
max. 1000 m
Power available [W]
1)
5
1)
3.5
Communication
server
(Main)
distribution 8. Connec-
frame
tion point
2 x 100
max. 150 m
4. Connection
point
2.
max. 20 m
Connection
point
2 x 100
Installation
Ω
2 x 100 Ω
Ω
123