Multiple channel system for a twisted pair telephone wire local loop system

• US 7,664,138 B2
• Filed: 11/19/2003
• Issued: 02/16/2010
• Est. Priority Date: 02/16/1999
• Status: Expired due to Fees

• Current Assignee: SBC Properties, L.P. (AT&T, Inc.)
• Original Assignee: AT&T Intellectual Property I LP (AT&T, Inc.)
• Inventors: Halling, Dale Brian, Starr, Thomas J. J., Skeba, Phillip George, Folds, Edward R., Ledbetter, Nelson Leon
• Primary Examiner(s): TRAN, PHUC H
• Application Number:
  US10/717,102
• Publication Number:
  US 20050123002A1
• Time in Patent Office: 2,281 Days
• Field of Search: 370/348, 370/468, 370/345
• US Class Current: 370/468
• CPC Class Codes: H04J 1/12 Arrangements for reducing cross-talk between channels in line transmission systems H04B3/32; in cables or lines H04B3/26 - H04B3/30
• CPC Class Codes: H04L 27/2601 Multicarrier modulation systems
• CPC Class Codes: H04L 43/00 Arrangements for monitoring or testing data switching networks
• CPC Class Codes: H04L 65/40 Support for services or applications

Abstract

The system (50) has a subscriber digital filter system (54)connected to the twisted pair telephone wire (56). A subscriber controller (52) sends control signals to the subscriber digital filter system (54). An office digital filter system (58) is connected to the twisted pair telephone wire (56). An office controller (60) sends control signals to the office digital filter system (58).

Claims

1. A multiple channel system for a twisted pair telephone wire local loop system, comprising:

a subscriber gateway system having a first transceiver coupled to the twisted pair telephone wire, the first transceiver to send and receive via multiple independent channels;

a second transceiver at a central office coupled to the twisted pair telephone wire, the second transceiver to send and receive via the multiple independent channels; and

a plurality of digital filters, operatively coupled to the first and second transceivers, configured to implement a frequency translation scheme, wherein the digital filters are to operate according to the frequency translation scheme to move a signal to an available frequency band associated with the multiple independent channels.

2. A multiple channel system as defined in claim 1, further comprising a digital subscriber line access multiplexer coupled to an output of the second transceiver.

3. A multiple channel system as defined in claim 1, further comprising a plurality of digital demodulators and a plurality of digital modulators coupled to the digital filters.

4. A multiple channel system as defined in claim 1, wherein the first transceiver in the subscriber gateway is to transmit a plurality of frequency division multiplexed signals.

5. A multiple channel system as defined in claim 1, wherein the first transceiver in the subscriber gateway is to transmit a plurality of time division multiplexed signals.

6. A multiple channel system as defined in claim 1, wherein the first transceiver in the subscriber gateway is to transmit a plurality of code division multiplexed signals.

7. A multiple channel system as defined in claim 1, further comprising a local circuit switch coupled to an output of the second transceiver.