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Users should ensure for their own protection that the electrical
ground connections of the power utility, telephone lines and inter-
nal metallic water pipe system, if present, are connected together.
This precaution may be particularly important in rural areas.
Caution: Users should not attempt to make such connections
themselves, but should contact the appropriate electric inspection
authority, or electrician, as appropriate.
''The Ringer Equivalence Number is an indication of the maxi-
mum number of terminals allowed to be connected to a telephone
interface. The termination on an interface may consist of any com-
bination of devices subject only to the requirement that the sum of
the Ringer Equivalence Numbers of all the devices does not ex-
ceed five.''
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