AT&T 7506 User Manual page 4

Disconnect the cords on the telephone and refer servicing to qualified service personnel
when these conditions exist:
when the cord or plug is damaged or frayed.
if liquid has been spilled into the telephone.
if the telephone has been exposed to rain or water.
if the telephone does not operate normally by following the operating instructions.
(Do not attempt to adjust any controls other than those described in the User's Manual.
Doing so may result in damage and require extensive work to restore the product to
normal operation.)
if the telephone has been dropped or the housing has been damaged.
if the product exhibits a distinct change in the performance.
SAVE THESE INSTRUCTIONS
When you see this warning symbol on the product, refer to the instructions
booklet packed with the product for information before proceeding.
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