The telco’s company’s company uses a variety of connections to bring the service to the customer locations. The typical connection is the two-wire service that we keep talking about. This two-wire interface to the network is terminated in a demarcation point, as required by law. The DEMARC is the point of least penetration into the customer’s premises, typically within 12 inches of where the telco’s company cable comes up into the building. (more…)