Abstract: In a method of transmitting data between a transmitter and a receiver via two pairs of wires in a differential mode, the method comprises transmitting, from the transmitter to the receiver, related signals onto the two pairs of wires in respect of each tone in a first subset of tones and processing the received signals in dependence upon estimated channel transfer functions associated with both direct and crosstalk channels. The method further comprises transmitting, from the transmitter to the receiver, unrelated signals onto the two pairs of wires for each tone in a second subset of the tones, the unrelated signals being vector precoded before transmission and wherein a cut-off frequency and/or tone demarcates between the first and the second subsets of tones.

Abstract: A system for transmitting data between two transceivers comprises a first transceiver (100e) connected to a second transceiver (100f) by means of a connection 41b comprising a plurality of pairs of wires. Each transceiver comprises a transmitter portion and a receiver portion. The transmitter portion comprises a transmitter for transmitting a set of data signals over the pairs of wires each pair of wires having a nearside end and a distal end, the nearside ends being connected to the transmitter and at least some of the distal ends being connected to the receiver portion of the other transmitter (100e), the data signals comprising a first subset of data signals and a second subset of data signals.

Abstract: A telecommunications access network comprises a primary aggregation point in the form of an exchange, a plurality of optic fiber to metallic pair interface aggregation points which may be in the form of Distribution Point Units (DPUs) each of which is connected to the primary aggregation point by a respective optical fiber connection, and a plurality of terminating devices which may be in the form of customer premises equipment (CPE) devices, each of which is connected to a respective one of the optic fiber to metallic pair interface aggregation points by a respective twisted metallic pair connection. The access network further includes a plurality of metallic, interface-interface connections between one or more pairs of the optic fiber to metallic pair interface aggregation points. Each metallic, interface-interface connection preferably comprises three or more twisted metallic pairs of wires.

Abstract: A method of transmitting data from a transmitter device to a plurality of receiver devices each of which is connected to the transmitter device via a respective wire connection the method comprising transmitting a common signal onto all or both of the respective wire connections and using a multiple access technique to enable respective virtual data channels to be generated for transmitting data from the transmitter device to each of the receiver devices via its own respective virtual data channel.

Abstract: A transmitter device 16 for transmitting data to a plurality of receiver devices 51, 52, 53, each of which is connected to the transmitter device via at least one respective pair of wires 21, 22, 23, each receiver device being operable to receive signals detected as a change over time in the potential difference across the local ends of each respective pair of wires extending between the receiver device and the transmitter device, the transmitter device being operable to transmit signals onto the wires extending between the transmitter device and the plurality of receiver devices in a plurality of different modes, over a plurality of different channels, the different modes including phantom and differential modes and the different channels including a first set of phantom channels, the transmitter comprising a phantom channel selector 1690 for selecting a second set of one or more phantom channels from the first set, the second set being a proper subset of the first set comprising one or more of the phantom c

Abstract: This disclosure includes a method, and a device for implementing the method, for creating a channel for transmitting data on a Digital Subscriber Line (DSL) connection, the method comprising: method for creating a channel for transmitting data on a Digital Subscriber Line (DSL) connection, the method comprising: defining a plurality of sets of tones, wherein each set of tones includes one or more tones used by a DSL connection; monitoring the transmission characteristics of each set of tones in the plurality of sets of tones; and creating a first channel for transmitting data on the DSL connection, including allocating a first set of tones of the plurality of sets of tones to the first channel based on the monitored transmission characteristics of the first set of tones and the transmission requirements of the first channel.

Abstract: Apparatus for communicating data between a transmitter device 16 and a first 51 and a second 52 receiver device, the receiver devices being connected, in use, to the transmitter device via a first 21 and a second 22 pair of wires respectively. Each receiver device is operable to receive signals detected as a change over time in the potential difference across the local ends of each respective pair of wires extending between the respective receiver device and the transmitter device, and the transmitter device is operable to transmit signals onto the wires at the transmitter ends thereof in order to transmit signals via a direct differential mode to each respective receiver via its respective pair of wires.

Abstract: A system (100), (200), (310), (320) for transmitting data between an upstream transceiver (100) and a downstream transceiver (200) via two pairs of wires (310), (320) extending between the transceivers.

Abstract: A transmitter device 16 for transmitting data to a plurality of receiver devices 51, 52, 53, each of which is connected to the transmitter device via at least one respective pair of wires 21, 22, 23, each receiver device being operable to receive signals detected as a change over time in the potential difference across the local ends of each respective pair of wires extending between the receiver device and the transmitter device, the transmitter device being operable to transmit signals onto the wires extending between the transmitter device and the plurality of receiver devices in a plurality of different modes, over a plurality of different channels, the different modes including phantom and differential modes and the different channels including a first set of phantom channels, the transmitter comprising a phantom channel selector 1690 for selecting a second set of one or more phantom channels from the first set, the second set being a proper subset of the first set comprising one or more of the phantom c

Abstract: Apparatus for communicating data between a transmitter device 16 and a first 51 and a second 52 receiver device, the receiver devices being connected, in use, to the transmitter device via a first 21 and a second 22 pair of wires respectively. Each receiver device is operable to receive signals detected as a change over time in the potential difference across the local ends of each respective pair of wires extending between the respective receiver device and the transmitter device, and the transmitter device is operable to transmit signals onto the wires at the transmitter ends thereof in order to transmit signals via a direct differential mode to each respective receiver via its respective pair of wires.

Abstract: This disclosure includes a method, and a device for implementing the method, for creating a channel for transmitting data on a Digital Subscriber Line (DSL) connection, the method comprising: method for creating a channel for transmitting data on a Digital Subscriber Line (DSL) connection, the method comprising: defining a plurality of sets of tones, wherein each set of tones includes one or more tones used by a DSL connection; monitoring the transmission characteristics of each set of tones in the plurality of sets of tones; and creating a first channel for transmitting data on the DSL connection, including allocating a first set of tones of the plurality of sets of tones to the first channel based on the monitored transmission characteristics of the first set of tones and the transmission requirements of the first channel.

Abstract: A method of transmitting data from a transmitter device to a plurality of receiver devices each of which is connected to the transmitter device via a respective wire connection the method comprising transmitting a common signal onto all or both of the respective wire connections and using a multiple access technique to enable respective virtual data channels to be generated for transmitting data from the transmitter device to each of the receiver devices via its own respective virtual data channel.

Abstract: Method and apparatus for retrieving the channel frequency response H(f), the noise N(f), measured at initialization and the signal to noise ratio SNR(f) measured at show time on a per bin basis, in the upstream or downstream direction. Initialization H(f) is used for analyzing the physical copper loop condition between tip and ring. Initialization N(f) is used for analyzing the crosstalk. Showtime SNR(f) is used for analyzing time dependent changes in crosstalk levels and line attenuation. The combination of H(f), N(f) and SNR(f) allows analysis of the line conditions for reaching the maximum data rate of a given loop, scheduling maintenance and plant update.

Abstract: A Digital Access Systems (DAS) Customer Premises Equipment (CPE) comprising: a DAS modem connected to an internal packet switched network having a switch and arranged such that the internal network is coupled to an external packet switched network by a DAS link over an access network; a network-telephony interface connected to the internal network and coupled to a customer premises telephony appliance; a network-data interface connected to the internal network and coupled to a customer premises data appliance; a controller to control the switch for establishing packet transfer paths between the modem and the interfaces to complete calls between the appliances and entities on the external network; and transferring of control and information signals between the controller and a computing function to adapt the controller to provide alternative packet transfer paths dependent on predetermined conditions in order to provide one or more additional CPE services.

Abstract: An equipment architecture for Voice over Digital Subscriber Line (VoDSL) equipment is provided, along with related methods of operation.

Abstract: A physical layer protocol is added to retrieve the in-band downstream ADSL channel frequency response H(f), the noise N(f), measured at initialization and the signal to noise ratio SNR(f) measured at show time on a per bin basis. Additionally retrieval of similar in-band information may be provided in the upstream direction. The definition of the message protocol for retrieving during show time the following ATU-R information on a per bin basis: In-band channel frequency response per bin HR(f) measured during the initialization referred back to the receiver tip and ring copper pair by the ARU-R; In-band noise estimation per bin NR(f) during the initialization referred back to the receiver tip and ring copper pair by the ATU-R; and the signal-to-noise ratio per bin SNRR(f) during show time referred back to the receiver tip and ring copper pair by the ATU-R. The values of SNRR(f) should be updated as they change.