Off-Premises Extension (OPX) - Definition or Meaning

Off-Premises Extension (OPX)

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Definition of “Off-Premises Extension (OPX)” :

An Off-Premises Extension (OPX) is a telecommunications term referring to an extension line from a main telephone system that connects to a device located outside the premises of the main system, such as a home or remote office. It enables the device to use the features of the central telephone system.

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