User's Manual

WS2000/WS4000 Operating Manual
11
2.1.4 Power
Two types of power are used in this phone.
- AC power : 90 ~ 400 V
- Internal Battery
If the AC power is suddenly disconnected to the phone by a power failure, or
for any other reason, the power source is automatically changed from AC
power to the internal battery. When the power switch is in ON status and
even though AC power is disconnected, this terminal will remain on
operation.
To disconnect all power from the phone, whether internal or external, the
power switch must be in the OFF position.