36 results about "High-bit-rate digital subscriber line" patented technology

Providing a high-speed data service and voice service in a transmission system employing two binary, one quarternary (2B1Q) modulation/demodulation, using a high-speed data service remote terminal, a plurality of user data service and voice service terminals, and a multi-rate digital subscriber line (MDSL) terminal connected to the remote terminal through a twisted pair line, and to the user terminals. During downstream voice service, the remote terminal assembles and transmits an high bit rate digital subscriber line (HDSL) frame by including signaling signals for the voice service and signal processing mode information in a user-defined interval of the high bit rate digital subscriber line frame, to the multi-rate digital subscriber line terminal through the twisted pair line. During upstream voice service, the remote terminal receives the high bit rate digital subscriber line frame and transmits the signaling signals received to an exchange.

A fixed broadband wireless data access service providing shared wide-band packet-switched data transport for high speed data access in areas where conventional ADSL service and fiber optic service are unavailable. The wireless data access service is a point-to-multipoint cellular-type network that connects customers to data service providers through the ATM backbone of an existing network. Customers connect to the ATM backbone and data service provider through a cellular grid in which a wireless base station in each cell communicates with the individual customer wireless equipment within its cell site coverage area. The base stations are connected to an ATM backbone switch through wireless and wireline backhaul links. The upstream and downstream bandwidths of the wireless broadband network are engineered in various symmetric and asymmetric configurations to provide a shared packet-switched connection that emulates an uninterrupted, direct wireline ADSL connection. The wireless broadband network employs a data protocol of shared access bandwidth and adaptive asymmetric data rates to support multiuser service sessions by wireless transmission. The wireless broadband network is not network protocol specific and can be applied to wireless asymmetric digital subscriber line service, wireless integrated service digital network over digital subscriber line service, wireless very high bit rate digital subscriber line service, or wireless symmetric or single-line digital subscriber line service.

In a particular embodiment a VDSL repeater is disclosed. The VDSL repeater includes a first interface for receiving data from an IPTV network node; a second interface for sending data to an end user client device; and an amplifier in electrical communication with the first interface for amplifying data received on the first interface from the IPTV network node when a power supply voltage is present on the first interface, wherein the amplifier sends the amplified data received on the first interface to the second interface. In another aspect of a particular embodiment the VDSL repeater further includes a circuit that bypasses the amplifier when the power supply voltage is not present on the first interface. In another particular embodiment a method for amplifying a VDSL signal when a power supply voltage is present on the twisted pair using the power supply voltage is disclosed.

A network interface device (NID) and associated printed circuit board is provided that includes metallic die cast housing and doors configured so that one of the doors, when closed, physically separates service provider circuitry from the customer premise equipment (CPE) side connections on a circuit card within the NID so that an end-customer may access the CPE side connections while the service provider circuitry remains secured from end-customer access. Moreover, the metallic housing provides increased physical strength and tamper resistance, including improved heat dissipation properties to radiate internal heat build-up more efficiently. The NID may be configured to provide insertable interface cards to permit flexibility in service provisioning and includes options for a type-200 T1 module, a type-400 T1 module, a type-200 high bit rate Digital Subscriber Line (HDSL) module, a type-400 HDSL module or an ISDN module.

Disclosed is a VDSL (very high bit-rate digital subscriber line) system on the DMT line coding method basis and a method for determining a length of cyclic prefix samples using the system. The VDSL system comprises a transmitter data including cyclic prefix samples through a channel; a receiver for receiving the data including the cyclic prefix samples; a controller for controlling the transmitter and the receiver to control an initialization operation including handshake, training, channel analysis, and exchange, and a data transmission operation after the initialization operation; and a cyclic prefix sample length estimator for estimating an optimized length of the cyclic prefix sample on the basis of the correlation between the cyclic prefix sample and other data. According to the present invention, since no complex TEQ configuration required when fixing and using the length of the cyclic prefix sample is used, its configuration becomes simpler, and the optiized length of the cyclic prefix sample can be accurately determined.

The present invention discloses a sort of wave filter circuit used for the very high bit-rate digital subscriber loop, used to fulfill the filtering, frequency mixing and severing of the upgoing signal and the downward signal of very high bite-rate digital subscriber loop VDSL, which includes: a transmitting wave filter circuit unit, a receiving wave filter circuit unit, a line wave filter circuit unit, a mixer circuit unit; the mixer circuit unit is respectively connected to the transmitting wave filter circuit unit, the receiving wave filter circuit unit and the line wave filter circuit unit, the sequence of the downward signal passes through the transmitting wave filter circuit unit, the mixer circuit unit and the line wave filter circuit unit; the sequence of the upgoing signal passes through the line wave filter circuit unit, the mixer circuit unit and the receiving wave filter circuit unit. Using this filter circuit the layout density of the VDSL equipment can be enhanced, the required expense of the replaced device in facility maintenance can be reduced, the circuit can well satisfy the requirement of matching the various characteristic impedance by replacing the build-out resistor.

The present application provides an SHDSL (Single-pair High bit rate Digital Subscriber Line) data frame processing method and device. The method comprises: calling a drive layer in an FPGA (Field Programmable Gate Array) through an application layer in the FPGA, using the drive layer to execute initialization configuration of an SHDSL dedicated chip, and obtaining, after the configuration is successful, a status signal that indicates the configuration is successful; and starting conversion between an original data frame and a PCM (Pulse Code Modulation) code frame according to the status signal of the FPGA, and sending the converted PCM code to the SHDSL dedicated chip to generate a SHDSL data frame. Therefore, the SHDSL (Single-pair High bit rate Digital Subscriber Line) data frame processing method and device solve the problems in the prior art that the rate of the conversion between the original data frame and the PCM code frame is low, and that an SHDSL-related module is large in size and causes high difficulty in management and maintenance of software and hardware.

An apparatus for and method of encapsulating Ethernet frame data in Very high speed Digital Subscriber Line (VDSL) frames. The VDSL frames are transmitted over a point to point VDSL link where they are subsequently extracted and forwarded as standard Ethernet frames. The VDSL facility transport system comprises an Ethernet to VDSL Consumer Premises Equipment (CPE) coupled to a DSL Access Multiplexor (DSLAM) over a VDSL transport facility. The Ethernet to VDSL CPE functions to receive a 10BaseT Ethernet signal and encapsulate the Ethernet frame into a VDSL frame for transmission over the VDSL facility. The DSLAM is adapted to receive VDSL frames, extract Ethernet frames therefrom and generate and output a standard Ethernet signal. Ethernet frames are encapsulated within VDSL frames and transmitted on the wire pair without regard to the state of the SOC signals. This overcomes the problems associated with syncing the transmission of the Ethernet data with the SOC signals. The present invention also provides a method of providing the receiving station an indication of the start of a VDSL frame. A preamble having certain desirable characteristics such as good autocorrelation properties, is used by the receiving station to identify the start of a VDSL frame. To further ensure that a detected start of frame is valid, the length field of the VDSL frame is examined for a legal length value.

The present invention comprises the following steps: the required link building rate is judged whether the rate is lower than the lowest link building rate; if the required link building rate is lower than the lowest link building rate, the low rate configuration of the link building is performed according to the standard lowest link building rate, and otherwise, the common configuration of the link building is performed according to the actual link building rate. The present invention also discloses a device for realizing a non-standard low rate link building on the single line pair high bit rate digital user line. Through the present invention, under the precondition that the network cost is not added, the application mode of the current perfect SHDSL technology is adopted to solve the special demand of the operator, and to provide powerful guarantee to the product leading in the market, and the present invention has very practical application prospect.