NEC Univerge SV8100 System Hardware Manual page 506

Issue 9.0
7 - 80
5. Mount the Screw Cover.
6. Attach the Front Cover to the Main Body using the Front Cover
fixed screws (Four M3 x 6 screws attach through the sides of
Wall Mount Bracket).
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When there is a gap between the Wall
Mounting Plate (on the wall) and the
Bracket, the Bracket may be warped due
to an over-tightened screw. Simply loosen
the screw.
The Wall Mount Bracket supports only
embedded wiring. Exposed wiring (Open
wiring) is not recommended.
When installing the optional Wall Mount
Bracket, ground the Doorphone using an
earth line from the earth connecting lug
on the Rear Cover to an electric service
ground (less than 100 ohms). Otherwise,
electric shock may occur.
Installing SV8100 Optional Equipment
UNIVERGE SV8100