Lenovo ThinkCentre M91 - Manual (Page 53)

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 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.
Polyvinyl Chloride (PVC) cable and cord notice
WARNING: Handling the cord on this product or cords associated with
accessories sold with this product will expose you to lead, a chemical known to
the State of California to cause cancer, and birth defects or other reproductive
harm. Wash hands after handling.
Chapter 7. Notices
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