NEC SL2100 - 4.3.5 Cancel Message Waiting; 4.4 Answering Calls; 4.4.1 Answering an Outside Call

SL2100 GETTING STARTED GUIDE
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• The screw diameter is 4 mm (0.158″) to 4.5 mm (0.177″).
• Wall-Mounting Screws (M4.1x 25: 4 pcs) are attached to the Chassis.
→ Another screw is installed after slide the chassis into the position.
3.
Align the three holes on the back of the Chassis with the three screws installed in the wall.
4.
Tighten the other screw at the lower left after you slide the chassis into the wall.