Installation
99
Mitel SMB Controller
syd-0657/2.0 – R6.0 – 09.2018
Note
In the case of an indirection connection make sure that the communication server’s earthing
wire does not form any earth loops with the earthed cable screenings of the installation cables
leading up to the (main) distribution frame. The cables should be kept as short as possible and
laid out in parallel.
4. 3. 2
Connecting the cable screening
When using shielded installation cables also use shielded RJ45 connectors. In this
way the shielding of the installation cables is automatically connected with the housing
of the communication server and therefore with the building earth.
Note
Connect the cable screens to one another at the splitting point only. Observe the tree structure
principle to prevent earth loops.
Fig. 20
Tree structure principle
4. 4
Powering the communication server
The communication server is powered as standard with 230 VAC or 115 VAC. To en-
sure that its operation is maintained even in the event of a mains outage, an external
uninterruptible power supply (UPS) must be used.
4. 4. 1
115/230 V power supply
The communication server is powered by the supplied power supply unit. The power
supply unit is connected to the mains using a two-pin standard power cable.
X
No earth
loops
Communica-
tion server
Socket-outlets
(Main) distribution
board