3.Use a Phillips screwdriver to remove the battery com- partment screw on the bottom of the system and lift off the cover.
4.Put the fresh batteries in the compartment as indicated by the polarity symbols (+ and
5.Replace the cover and tighten the screw. Reconnect the phone line.
6.Turn the system over so you can see the display. After you install batteries, the system displays TWIN640 REV 1.6 (information about the system’s software), SET LANGUAGE, then ENGLISH (the default display language).
7.To select another language, repeatedly press 
within 2 minutes. The display cycles through FRENCH,
SPANISH, and ENGLISH.
Note: If you do not press any key within 2 minutes, the system automatically selects English.
8.Press 
to store the selected language. 000 and SET AREA CODE appear. The first 0 flashes.
9.Within 2 minutes, repeatedly press 
until the first digit of your area code appears, then press 
to enter the digit. The second 0 flashes.
Repeat this step to set the second and third digits of your area code.
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