That portion of a public switched network that connects access nodes to individual subscribers. The Access Network today is predominantly passive twisted-pair copper wiring. Access Nodes Points on the edge of the Access Network that concentrate individual access lines to a smaller number of feeder lines. Access Nodes may also perform various forms of protocol conversion.
CAPs operate private networks independent of LECs.
A digital modulation scheme that uses DSPs to pump more than six megabytes per second of data over one copper twisted pair. Modems on either end of a single twisted pair wire that deliver ISDN Basic Rate Access. Outside North America and Japan a PRI usually has 30 B channels and 1 D channel and an E1 interface. Modems on either end of one or more twisted pair wires that deliver T1 or E1 speeds. At present T1 requires two lines and E1 requires three.