Polycom VoiceStation 100 Installation Instructions And User Manual page 15

The equipment must also be installed using
an acceptable method of connection. The
customer should be aware that compliance
with the above conditions may not prevent
degradation of service in some situations.
Repairs to certified equipment should be
coordinated by a representative designated
by the supplier. Any repairs or alterations
made by the user to this equipment,
or equipment malfunctions, may give
the telecommunications company cause
to request the user to disconnect the
equipment. Users should ensure for their
own protection that the electrical ground
connections of the power utility, telephone
lines and internal 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.''
''NOTICE: The Ringer Equivalence
Number (REN) assigned to each relevant
terminal device provides an indication
of the maximum number of terminals
allowed to be connected to a telephone
interface. The termination on an interface
may consist of any combination of devices
subject only to the requirement that the
sum of the Ringer Equivalence Numbers of
all the devices does not exceed 5.''
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