Mitel Aastra 470, Системное руководство, Страница: 159 / 284

Installation
159
Aastra 470 as of R3.2
syd-0337/1.6 – R3.2 – 09.2014
Earthing
The EFOP fan-out-panel has 4 equivalent connections for the protective earthing
(see
Fig. 69 ).
Warning
Because analogue trunk lines are to be routed via the fan-out panel EFOP,
for safety reasons the fan-out panel must be connected to the protective
earth.
Fig. 69 Connection of an EFOP fan-out-panel
Tips
– Use the same mains socket to connect the power supply of the com-
munication server and the power supply of the EFOP fan-out-panel to
the mains power. This prevents an unwanted switchover in the event
of a mains failure on the EFOP fan-out-panel only.
– In redundancy operation, connect the communication server and the
APS2 auxiliary power supply unit to separately protected mains power.
This will further enhance the system's operating reliability.
EFOP
To the
communica-
tion server
Mains power 2
Power supply 2 (for power
supply redundancy only) Power supply 1
Mains power 1
To the earth
connection
Stranded copper
yellow/ green
4,0 mm
2
unprotected
Copper wire yellow/ green
2,5 mm
2
protected
4,0 mm
2
unprotected