Editing Demarcation point (section)

{{Redirect|Dmark|the currency formerly used in Germany|Deutsche Mark}}
{{distinguish|Demarcation line}}
{{Use American English|date=January 2019}}{{Short description|Boundary of a private and public network
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{{More citations needed|date=April 2016}}
[[Image:Demarc.jpg|thumb|right|Old and new style demarcation points in a Canadian home built in 1945. A line splitter has been plugged into the modern demarc on the right.  From this junction, one line passes through a [[DSL filter]] before going to the old demarc, and from there to the remainder of the house; the other connection may be run to the subscriber’s [[DSL modem]].]] 

In [[telephony]], the '''demarcation point''' is the point at which the [[public switched telephone network]] ends and connects with the customer's [[on-premises wiring]].  It is the dividing line which determines who is responsible for installation and maintenance of wiring and equipment—customer/subscriber, or [[telephone company]]/provider.  The demarcation point varies between countries and has changed over time.

''Demarcation point'' is sometimes abbreviated as '''demarc''', '''DMARC''', or similar.  The term '''MPOE''' ('''minimum''' or '''main point of entry''') is synonymous, with the added implication that it occurs as soon as possible upon entering the customer premises.  A [[network interface device]] often serves as the demarcation point.