Patent ID: 6320878
Filing Date: 2001-11-20
Classification: H04N

Abstract:
An active demarcation point (UP) of an access network (NET) having a single downstream channel and a single upstream channel for bidirectional signal transmission, comprising:at least two devices (BP4, BP5, BP6, BS4, BS5, BS6) for frequency-splitting received signals in the single upstream channel;at least two switches (S4, S5, S6) connected with the at least two devices (BP4, BP5, BP6, BS4, BS5, BS6) and serving to block or unblock individual upstream frequency ranges;a measuring unit (MESS2) for measuring the amplitudes or intensities of the frequency-split received signals in the individual upstream frequency ranges; anda control unit (CTRL) for evaluating the measured amplitude or intensity values and controlling the at least two switches (S4, S5, S6),wherein the active demarcation point (UP) provides an interface between the access network (NET) and customer premises equipment (END), wherein the active demarcation point (UP) is between the customer premises equipment (END) and a cable (COAX), and wherein the customer premises equipment (END) comprises at least two terminal types selected from the group consisting of a computer (PC) attached via a modem (MODEM), a television set (TV) attached via a set-top box (STB), a telephone (TEL), and a fax unit (FAX).