H - Electricity – 04 – M
Patent
H - Electricity
04
M
H04M 11/06 (2006.01) H04M 3/428 (2006.01) H04Q 3/00 (2006.01) H04M 7/12 (2006.01)
Patent
CA 2246981
Enhanced signaling and call routing is provided in a telephone communications network that includes a local telephone central office having a POTS line connection between a subscriber station and an access junction of the office. A voice path interfaces the access junction with a circuit switch for conventional dial-up voice call placement. Modem data calls, however, follow an access path from the junction as a physical switched connection terminated in layer 1 of a network data-switching matrix. The access path continues therefrom to a data switch which interfaces an Internet service provider. Interfacing the data and circuit switches, a network controller functions to selectively configure communications paths within the central office and between the office and network in response to commands originating at the subscriber station or incoming from other networks. Additional controller functions include blocking subscriber-originated traffic from the access path and queuing incoming network-side traffic when an Internet call is on hold, invoking a tear-down of the physical switched connection to free the access path for incoming and outgoing call attempts, converting PSTN-based voice signals to an IP-based voice format and transmitting any queued data to the subscriber station followed by restoration of normal data communications.
Borden Ladner Gervais Llp
Nortel Networks Limited
Northern Telecom Limited
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