Voice and data transmission over twisted wire pairs

• US 6,185,284 B1
• Filed: 11/13/1998
• Issued: 02/06/2001
• Est. Priority Date: 07/14/1989
• Status: Expired due to Fees

• Current Assignee: United Access Technologies LLC
• Original Assignee: CAIS, INCORPORATED, Inline Connection Corporation
• Inventors: Goodman, David D.
• Primary Examiner(s): Chan, Wing F.
• Application Number:
  US09/191,168
• Time in Patent Office: 816 Days
• Field of Search: 379/90.01, 379/120-1-1, 379/93.17, 379/93.26, 379/93.28, 379/93.37, 379/93.01, 348/14-16, 348/734, 348/7
• US Class Current: 379/93.01
• CPC Class Codes: H04H 20/81 combined with telephone network over which the broadcast is continuously available
• CPC Class Codes: H04M 11/062 using different frequency bands for speech and other data
• CPC Class Codes: H04N 7/104 Switchers or splitters
• CPC Class Codes: H04N 7/106 for domestic distribution
• CPC Class Codes: H04N 7/108 the cable being constituted by a pair of wires
• CPC Class Codes: H04N 7/147 Communication arrangements, e.g. identifying the communication as a video-communication, intermediate storage of the signals selecting H04Q
• CPC Class Codes: H04N 7/18 Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast

Abstract

A system that provides video signal communication between a source of the video signal and a plurality of units that include destinations of the video signal includes an interface coupled to the source and to telephone lines, each of which serves at least one of the units and carries voice signals to and from one or more telephones coupled to the telephone line at said unit. The interface receives the video signal from the source, and transmits the received video signal onto at least one of the telephone lines in a selected frequency range that is different from frequencies at which the voice signals are carried on that telephone line. This causes the video signal to be coupled to a receiver which is connected to the telephone line at the unit served by that line and is adapted to recover the video signal from the telephone line and apply it to one or more of the destinations at the unit. The source is a cable (e.g., electrical or fiber optic) that is linked to the interface and that carries a plurality of video signals. The destinations are, e.g., televisions. The units can be residences (such as individual houses or apartments in an apartment building) or offices in an office building.

Claims

1. A method for communicating information between an external source of information and a plurality of destinations of information over a telephone wiring network used for passing telephone signals in a telephone voice band between a plurality of telephone devices and a telephone exchange, comprising:

receiving at a signal interface a plurality of external data streams from the external source of information;

Manchester encoding the external information streams to produce Manchester encoded signals with signaling rates such that the energy of the encoded signals is concentrated primarily at frequencies above the telephone voice band; and

transmitting the Manchester encoded signals over the telephone wiring network to each transceiver.

3. The system of claim 1 wherein the Manchester encoded signals are Ethernet 10Base-T signals.

2. A system for communicating information between an external source of information and a plurality of destinations of information over a telephone wiring network used for passing telephone signals in a telephone voice band between a plurality of telephone devices and a telephone exchange, comprising:

a plurality of transceivers coupled between the telephone wiring network and corresponding destinations of information, each including

circuitry for accepting signals in a high frequency band of frequencies above the highest frequency of the telephone voice band and rejecting signals in the telephone voice band; and

a signal interface coupled between the external source of information and the telephone wiring network, including

circuitry for receiving a plurality of data streams from the external source of information,

circuitry for Manchester encoding the received data streams to produce Manchester encoded signals with signaling rates such that the energy of said signals is concentrated above the telephone voice band, and

circuitry for transmitting the Manchester encoded signals over the telephone wiring network to each transceiver.