Telephone communication system and method over local area network wiring
First Claim
1. A circuit arrangement for coupling an information device and a digital data device to a local area network cable having at least first and second twisted wire pairs in a building, and simultaneously carrying a full-duplex packet- based digital data signal and an information signal, the device comprising:
- a first local area network connector connectable to the local area network cable;
a second local area network connector connectable to a digital data device for coupling the full-duplex packet-based digital data signal to the digital data device; and
an information port couplable to the information device for coupling the information signal to the information device, wherein each of the first and second twisted pairs is operative to carry a packet-based digital data signal, and the at least two twisted pairs cooperatively form a phantom channel operative to carry the information signal.
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Accused Products
Abstract
A method and apparatus for enabling a local area network wiring structure to simultaneously carry digital data and analog telephone signals on the same transmission medium. It is particularly applicable to a network in star topology, in which remote data units (e.g. personal computers) are each connected to a hub through a cable comprising at least two pairs of conductors, providing a data communication path in each direction. Modules at each end of the cable provide a phantom path for telephony (voice band) signals between a telephone near the data set and a PBX, through both conductor pairs in a phantom circuit arrangement. All such communication paths function simultaneously and without mutual interference. The modules comprise simple and inexpensive passive circuit components.
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Citations
26 Claims
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1. A circuit arrangement for coupling an information device and a digital data device to a local area network cable having at least first and second twisted wire pairs in a building, and simultaneously carrying a full-duplex packet- based digital data signal and an information signal, the device comprising:
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a first local area network connector connectable to the local area network cable;
a second local area network connector connectable to a digital data device for coupling the full-duplex packet-based digital data signal to the digital data device; and
an information port couplable to the information device for coupling the information signal to the information device, wherein each of the first and second twisted pairs is operative to carry a packet-based digital data signal, and the at least two twisted pairs cooperatively form a phantom channel operative to carry the information signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15)
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14. A local area network in a building for simultaneously carrying a full-duplex packet-based digital data signal between first and second digital data units and an information signal between first and second information units, the network comprising:
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a local area network cable at least in part in a wall of the building and accessed via outlets, having first and second ends and comprising at least two twisted wire pairs, each wire pair being operative to carry the packet-based digital data signal, and said at least two twisted wire pairs cooperatively forming a phantom channel simultaneously operative to carry the information signal;
a first device connected to said first end of said local area network cable, said first device being couplable to the first digital data unit for coupling the packet- based digital data signal to the first digital data unit, and being further couplable to the first information unit for coupling the information signal to the first information unit; and
a second device connected to said second end of said local area network cable, said second device being couplable to the second digital data unit for coupling the packet-based digital data signal to the second digital data unit, and being further couplable to the second information unit for coupling the information signal to the second information unit. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification