# US 2013/0155893 A1 · Multiple channel system for a twisted pair telephone wire local loop system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0155893 A1 - Document ID: US20130155893A1 - Status: Published application - Kind: A1 - Application number: 13/762,636 - Filed: 2013-02-08 - Published: 2013-06-20 - Earliest claimed: 1999-02-16 - Assignees: AT&T Intellectual Property I, L.P. - Inventors: Phillip George Skeba; Dale Brian Halling; Nelson Leon Ledbetter; Edward R. Folds; Thomas J.J. Starr - Web page: https://patentgrep.com/patent/US20130155893A1 ## CPC - H04J 1/12: Arrangements for reducing cross-talk between channels {(in line transmission systems H04B3/32; in cables or lines H04B3/26 - H04B3/30)} - H04L 43/00: Arrangements for monitoring or testing data switching networks - H04L 27/2601: {Multicarrier modulation systems} - H04J: MULTIPLEX COMMUNICATION (transmission in general H04B; peculiar to transmission of digital information H04L5/00; systems for the simultaneous or sequential transmission of more than one television signal H04N7/08; in exchanges H04Q11/00; stereophonic systems H04S) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract Example multiple channel systems for a twisted pair telephone wire local loop system are disclosed. An example method includes implementing, via a digital filter at a subscriber gateway, a frequency translation received from a first controller of a switching office in response to a bandwidth allocation request, wherein the frequency translation moves a signal to an available frequency band identified by the first controller of the switching office; operating a second controller at the subscriber gateway to control the digital filter; and transmitting a plurality of frequency division multiplexed signals via a first transceiver configured to send and receive via multiple independent channel located at the subscriber gateway. ## Claims ### Claim 1 A method, comprising: implementing, via a digital filter at a subscriber gateway, a frequency translation received from a first controller of a switching office in response to a bandwidth allocation request, wherein the frequency translation moves a signal to an available frequency band identified by the first controller of the switching office; operating a second controller at the subscriber gateway to control the digital filter; and transmitting a plurality of frequency division multiplexed signals via a first transceiver configured to send and receive via multiple independent channel located at the subscriber gateway. ### Claim 2 (depends on 1) A method as defined in claim 1, further comprising summing outputs of the digital filter using a summer. ### Claim 3 (depends on 1) A method as defined in claim 1, wherein the digital filter is coupled to a twisted pair telephone wire. ### Claim 4 (depends on 1) A method as defined in claim 1, wherein the second controller is to up-convert and down-convert signals in the frequency domain. ### Claim 5 (depends on 1) A method as defined in claim 1, further comprising performing a link quality analysis to test bandwidth. ### Claim 6 (depends on 1) A method as defined in claim 1, wherein the first transceiver is to communicate via a digital subscriber line access multiplexer to provide access to a data network. ### Claim 7 (depends on 1) A method as defined in claim 1, wherein the available frequency band is identified by selecting an unused frequency band. ### Claim 8 A tangible machine readable storage medium comprising instructions that, when executed, cause a machine to perform operations comprising: in response to receiving, at a first transceiver to send and receive via multiple independent channels located at a subscriber gateway, a frequency translation from a first controller at a switching office in response to a bandwidth allocation request: implementing the frequency translation via a digital filter at the subscriber gateway, wherein the frequency translation moves a signal to an available frequency band identified by the first controller at the switching office; operating a second controller at the subscriber gateway to control the digital filter; and transmitting a plurality of frequency division multiplexed signals via the first transceiver. ### Claim 9 (depends on 8) A storage medium as defined in claim 8, wherein the operations further comprise summing outputs of the digital filter using a summer. ### Claim 10 (depends on 8) A storage medium as defined in claim 8, wherein the digital filter is coupled to a twisted pair telephone wire. ### Claim 11 (depends on 8) A storage medium as defined in claim 8, wherein the second controller is to up-convert and down-convert signals in the frequency domain. ### Claim 12 (depends on 8) A storage medium as defined in claim 8, wherein the operations further comprise performing a link quality analysis to test bandwidth. ### Claim 13 (depends on 8) A storage medium as defined in claim 8, wherein the operations further comprise communicating via a digital subscriber line access multiplexer to provide access to a data network. ### Claim 14 (depends on 8) A storage medium as defined in claim 8, wherein the available frequency band is identified by selecting an unused frequency band. ### Claim 15 An apparatus, comprising: a memory comprising machine readable instructions; a processor to execute the machine readable instructions to perform operations comprising: receiving, at a first transceiver to send and receive via multiple independent channels located at a subscriber gateway, a frequency translation from a first controller at a switching office in response to a bandwidth allocation request; implementing the frequency translation via a digital filter at the subscriber gateway, wherein the frequency translation moves a signal to an available frequency band identified by the first controller at the switching office; operating a second controller at the subscriber gateway to control the digital filter; and transmitting a plurality of frequency division multiplexed signals via the first transceiver. ### Claim 16 (depends on 15) An apparatus as defined in claim 15, wherein the operations further comprise summing outputs of the digital filter using a summer. ### Claim 17 (depends on 15) An apparatus as defined in claim 15, wherein the digital filter is coupled to a twisted pair telephone wire. ### Claim 18 (depends on 15) An apparatus as defined in claim 15, wherein the second controller is to up-convert and down-convert signals in the frequency domain. ### Claim 19 (depends on 15) An apparatus as defined in claim 15, wherein the operations further comprise performing a link quality analysis to test bandwidth. ### Claim 20 (depends on 15) An apparatus as defined in claim 15, wherein the operations further comprise communicating via a digital subscriber line access multiplexer to provide access to a data network.