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Preface
ix
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. The REN of this
product is 0.3.
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