Radio Shack 310 - Manual (Page 8)

8
If your module is not performing as it should, check the connec-
tion to the telephone line. Calls are automatically switched and
routed through complex equipment, so you might occasionally
hear noise on the line. When a call is too noisy, hang up and re-
dial the number. If you still have problems, immediately discon-
nect the module. If a telephone on the same line works properly,
the fault is in the module or its installation. If you are unable to
locate the problem, take your module to your local RadioShack
store for assistance.
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