Qwest Communications International Inc.

James W Nevelle

Bruce A Phillips

Todd A Pett

Kurt A Campbell

Richard H Fink

Joseph P Huggins

Donald L Brodigan

Darwei Kung

David J Arens

Qi Wang

Paula C Poberzyn

Clinton L Cave

Kurt Campbell

An XDSL signal distribution system is provided having a regenerator unit located a predetermined distance from a central office XTU unit for extending the distribution reach of the system. The regenerator is arranged to decode the payload of transmitted XDSL signals into base digital data before repackaging and regeneration onto a twisted pair copper cable. This allows the regenerator to selectively reformat the XDSL signals into a desired protocol format suitable for either an ATM protocol layer, or direct transmission. In addition, the regenerator can retransmit the XDSL signals at a fixed or variable transmission rate to optimize data through-put or system reach.

System and method for increasing distribution distance of XDSL type signals

A broadband communication system and method utilizing an asynchronous transfer mode core switch is provided. A plurality of central offices are connected to the asynchronous transfer mode network. An asynchronous transfer mode core switch connects to the asynchronous transfer mode network. The core switch is connected to each central office to allow an information provider, such as a video or data provider, to communicate with the plurality of central offices through the core switch. That is, the core switch provides numerous advantages, including a defined point of entry into the asynchronous transfer mode network.

Broadband communication system and method

Subscriber loops often contain bridged taps which may interfere with the transmission of DSL signals. A bridged tap terminator provides high tap impedance for POTS signals, low insertion loss for DSL signals, and impedance matching for DSL signals when connected to the bridged tap.

Bridged tap terminator

A test procedure for a VDSL distribution loop utilizes loop pre-qualification based on information stored in a network database in combination with field tests that are performed to confirm minimum performance capabilities of pre-qualified loops. During qualification, a VDSL test signal is sent on the loop, and SNR and bit error ratios are measured for desired upstream and downstream transmission rates. These measurements are compared to threshold values to verify performance of the loop for VDSL use. Thus, a cost effective test process is provided which allows accurate test data collection for sensitive VDSL distribution loops without the need for any pre-provisioning of the loop, and to allow for validation of the loop configuration database.

Method for testing VDSL loops

An asynchronous transfer mode (ATM) based very-high-bit-rate subscriber line (VDSL) communication system includes an optical ring having a plurality of multiplexers. An information provider is connected to the optical ring via a first one of the multiplexers. The information provider includes an ATM core switch operable with the first one of the multiplexers for transmitting data and video signals on to the optical ring and for receiving data signals from the optical ring. Each of a plurality of central offices is connected to the optical ring via a respective one of the multiplexers. Each of the central offices includes an ATM edge switch operable with the respective one of the multiplexers for receiving video and data signals from the information provider via the optical ring and for transmitting data signals to the information provider via the optical ring. The information provider communicates with the central offices through a single optical ring. The central offices are configured to transform single video and data signals from the information provider into multiple signals for use by host digital terminals. The central offices are also configured to statistically multiplex multiple data signals from the host digital terminals into a single data signal for transmission to the information provider via the optical ring. The central offices are further configured to integrate a local public, educational, and government video signal with a video signal received from the information provider for use by the host digital terminals.

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Highlands Ranch, CO, United States of America

James W Nevelle