NEC DS1000/2000 - Manual (Page 10)

Installation
Installing the Base
6 ◆ Chapter 1: Installation DS1000/2000 Cordless Telephone User Guide
Figure 3: Correct Installation Methods
Figure 4: Incorrect Installation Methods
80683 - 7
Correct line-of-site installation, away
from devices that cause interference or
locations that block signal.
80683 - 6
Too close to another
device that emits EMI
Too close to other
900 Mhz devices
Metal studs
Foil backed insulated ceiling
Behind a door that
can be closed, tinted windows
or one way glass