Radio Shack ET-2105 ユーザーズマニュアル

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If you still have problems, disconnect the phone. If other phones
on the same line work properly, the fault is in this phone or its in-
stallation. If you cannot find the problem, take the phone to your
local RadioShack store for assistance.
CARE
Keep the phone dry; if it gets wet, wipe it dry immediately. Use
and store the phone only in normal temperature environments.
Handle the phone carefully; do not drop it. Keep the phone away
from dust and dirt, and wipe it with a damp cloth occasionally to
keep it looking new. Modifying or tampering with the phone’s inter-
nal components can cause a malfunction and might invalidate its
warranty and void your FCC authorization to operate it. If your
phone is not performing as it should, take it to your local Ra-
dioShack store for assistance. If the trouble is affecting the tele-
phone lines, the phone company can ask you to disconnect your
phone until you have resolved the problem.
You can receive but 
not make calls.
Set TONE/PULSE correctly for the type of service 
you have (see “Setting the Dialing Mode” on 
Page 10).
Problem
Suggestion