Apparatus for provision of broadband signals over installed telephone wiring

• US 5,878,047 A
• Filed: 11/15/1996
• Issued: 03/02/1999
• Est. Priority Date: 11/15/1996
• Status: Expired due to Term

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Willner, Barry E., Stern, Edith H., Ganek, Alan G.
• Primary Examiner(s): Jung, Min
• Application Number:
  US08/751,121
• Time in Patent Office: 837 Days
• Field of Search: 370/445, 370/485, 370/486, 370/487, 370/488, 370/489, 370/490, 370/493, 370/496, 370/497, 370/522
• US Class Current: 370/486
• CPC Class Codes: H04L 12/2854 Wide area networks, e.g. public data networks
• CPC Class Codes: H04L 12/2856 Access arrangements, e.g. Internet access asynchronous transfer mode networks H04L12/5601; broadband local area networks H04L12/2801; optical access or distribution networks H04Q11/0067; access to open networks H04L12/5691; digital subscriber line end-user equipment and bit-level processing of data on a PSTN-based network H04M11/00; home network gateways H04L12/2834; wireless access networks H04W
• CPC Class Codes: H04L 12/2867 Physical combinations
• CPC Class Codes: H04L 12/5692 Selection among different networks
• CPC Class Codes: H04M 11/062 using different frequency bands for speech and other data
• CPC Class Codes: H04Q 11/04 for time-division multiplexing H04Q11/0001 takes precedence
• CPC Class Codes: H04Q 2213/13039 Asymmetrical two-way transmission, e.g. ADSL, HDSL
• CPC Class Codes: H04Q 2213/13103 Memory
• CPC Class Codes: H04Q 2213/13106 Microprocessor, CPU
• CPC Class Codes: H04Q 2213/1319 Amplifier, attenuation circuit, echo suppressor
• CPC Class Codes: H04Q 2213/13199 Modem, modulation
• CPC Class Codes: H04Q 2213/13298 Local loop systems, access network

Abstract

A network includes a facility for transmitting baseband telephone signals, plural subscriber locations, and twisted pair circuits which connect each subscriber location to the baseband telephone facility. The network further includes apparatus for transmitting and receiving broadband signals over the twisted pair circuits. A broadband transmitter is coupled to a network twisted pair circuit and outputs a broadband signal for delivery to a subscriber location. A first twisted pair circuit is utilized as an intermediate transmission path for the broadband signals. A distribution module is coupled to the first twisted pair circuit and is connected to a destination subscriber location via a destination twisted pair circuit. First filter circuits are connected in the network twisted pair circuit; are transparent to the baseband telephone signals and block the broadband signals. Second filter circuits are connected in the first twisted pair circuit; are transparent to baseband telephone signals and block the broadband signals. A coupling circuit connects the first and second filter circuits and enables passage of broadband signals from the network twisted pair circuit to the first twisted pair circuit, and then to a distribution module and to a broadband destination location.

Claims

1. A network including a central facility for transmitting baseband telephone signals to a plurality of subscriber locations, said network further comprising:

a first twisted pair circuit for connecting said central facility to a telephone subscriber location and for carrying said baseband telephone signals thereto;

a second twisted pair circuit for carrying broadband signals;

distribution means coupled to said first twisted pair circuit, said second twisted pair circuit and to a broadband subscriber location via a destination twisted pair circuit, said broadband subscriber location and telephone subscriber location having no predetermined telephony electrical interconnection; and

said distribution means further including a broadband coupling circuit for connecting said first twisted pair circuit and said second twisted pair circuit, and for enabling broadband signal flow between said first twisted pair circuit and said broadband subscriber location but blocking baseband telephone signal flow therebetween.

2. The network as recited in claim 1, wherein said second twisted pair circuit and first twisted pair circuit form portions of twisted pair circuits other than said destination twisted pair circuit.

3. The network as recited in claim 2, wherein said destination twisted pair circuit which connects said broadband subscriber location to said distribution means exhibits a physical length of no greater than about 1500 feet.

4. The network as recited in claim 1, further comprising:

modem means positioned within said broadband destination location and coupled to said destination twisted pair circuit, said modem means exhibiting a passband for received signals that excludes said baseband telephone signals, but includes broadband signals, thereby enabling said modem means to be directly connected to said destination twisted pair circuit.

5. The network as recited in claim 1, wherein all circuits within said broadband destination location that are coupled to said destination twisted pair circuit are twisted pair circuits used for carrying said baseband telephone signals.

6. The network as recited in claim 1, wherein each said distribution means further includes circuit means for separating said baseband telephone signals from said broadband signals to enable unimpeded passage of said baseband telephone signals through said distribution means.

7. The network as recited in claim 6, wherein each said distribution means further includes circuit means for routing said broadband signals in accord with address information to one or more broadband destination locations.

8. The network as recited in claim 6, further comprising a broadband transmission means for providing broadband signals, and wherein plural distribution means are coupled between said broadband transmission means and each said subscriber location to provide routing of broadband signals between said plural distribution means and between said plural distribution means and said subscriber locations.