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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.
If your equipment is in need of repair, refer to
Warranty, Sales, and Service Information
in the front of this document.