News & Resources News & MediaCheck here for the latest information about Demarc Extension Nationwide.Concert Technologies BlogStay updated with Demarc Extension information and industry news via our blog.White Paper“The Demarc Extension and its Critical Role in Enterprise Network Telecommunications Infrastructure”Video LibraryWatch our Demarc Extension videos.Demarc Extension DiagramsThese diagrams show the various configurations that may occur when extending a circuit’s demarcation point.Labeling StandardsDemarc Extension Nationwide has developed the standards to be adhered to when installing and servicing a demarc extension.