TMC ET4000 - Manual (Page 78)

1 Make sure the AC cord remains
attached to the telephone and to an
electrical outlet.
2 Turn the telephone over.
3 Remove desk pedestal/wall mount
bracket if attached.
4 Remove battery door cover by using
the tip of a ball-point pen, or paper
clip, or similar object to release the
battery door tab.
5 Remove the old battery.
6 Insert a new 9-volt battery.
7 Close the battery cover.
Additional Information
Replacing Your Battery
Operation During a Power Failure
Your EPIC telephone uses AC power from a
standard wall outlet. As long as the tele-
phone is connected to a wall outlet, it will
operate using the AC power. Please remem-
ber to plug your telephone into a wall out-
let that is not controlled by a wall switch.
If AC power is disconnected or there is a
power failure, the telephone automatically
switches to battery operation for approxi-
mately two hours. When the power is
restored, the telephone automatically switch-
es back to AC power and resumes normal
operation. If the battery is missing or low on
power when AC power is lost, the telephone
will not function. However, all feature settings
and memory numbers will be maintained,
since they are stored in a static memory that
retains its contents without electricity.
Please note that it is not necessary for you to
install a battery in your Epic telephone for it to
function normally. In fact, a battery is not even
needed to preserve your memory dial numbers
in the event of a power failure. This is because
all memory dial numbers are stored in a static
memory which retains its contents even with no
electrical power. The only purpose of having a
battery installed is so that the telephone itself
can function for up to two hours in the event of a
power failure. You may wish to install a battery
in at least one Epic phone for emergency opera-
tion, or have another standard phone available.
If you do choose to install a battery in your Epic
telephone, we recommend only the use of an
alkaline battery. Also, please make sure to
install the battery after the telephone has
already been plugged into the AC electrical out-
let.
Note: It is recommended that you have at
least one standard telephone connected, that
does not require battery power, so that you
are always sure to have use of a telephone
during a power failure.
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