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6
Installation
If you use more than one phone or other device on the line, add
up all the RENs. If the total is more than five (or three in rural
areas), your phone might not ring and your system might not
answer. If ringer operation is impaired, remove a device from
the line.
ˆ
Installation
INSTALLING THE BACKUP BATTERY
If AC power fails or you unplug the system, one 9V alkaline
battery (not supplied) is required to save any recorded
messages and the settings for the day and time. For the best
performance and longest life, we recommend a RadioShack
alkaline battery.
Caution:
Use a fresh battery of the required size and
recommended type.
1. Use a Phillips screwdriver to remove the screw on the
battery compartment cover and remove the cover.
2. Attach a 9V alkaline battery to the terminals and place the
battery in the compartment.
3. Replace the cover and secure it with the screw.
Replace the battery when the LOW BATT indicator flashes
while the system is connected to AC power.
Warning:
Dispose of the old battery promptly and properly. Do
not burn or bury it.
43-3801a.fm Page 6 Monday, February 25, 2002 8:56 AM