What is the Demarcation Point (DEMARC,DMARC)

The demarcation point marks the point where communications facilities owned by one organization interface with that of another organization. In telephone terminology, this is the interface between customer-premises equipment and network service provider equipment.

Abbreviations of demarcation point include DMARC, demarc, or similar.

A synonymous term with the demarcation point is the minimum or main point of entry (MPOE). The MPOE is the “physical” point at which the provider’s lines cross into the customer’s building (or sometimes across a property line).

The Demarc is the “electrical” point at which the provider’s lines are terminated to the customer premise equipment. That point is an important distinction since it determines who owns the hardware (and usually its problems) on either side.

At CUSI, DMARC installation in a part of our national electrical rollout services, including trenching, boring and backboarding.


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