High-bit-rate digital subscriber line

About: High-bit-rate digital subscriber line is a research topic. Over the lifetime, 516 publications have been published within this topic receiving 8537 citations. The topic is also known as: HDSL & high-bit-rate DSL.

Design and implementation for 125 mW/MIPS ultra-high speed low power asymmetric digital subscriber line transceiver chip

Abstract: Multimedia service with audio and video have become most desirable as the ADSL technology ideally converted from 1.5 Mbps full duplex HDSL technology via two twist-pair into 6.144 Mbps transmission technology via single twist-pair. This results in an interactive transmission service of T1 & E1 class data using the subscriber line without repeaters. The ADSL transceiver chipset is configured by DMT (Discrete Multi Tone modulation) scheme and RISC-based DSP core structure. Our ADSL chip is to be used in VOD, interactive interact service and/or teleconferencing system, etc. The operating frequency and dissipated power of the chip are 40 MHz and 5 W at 5 V.

Subscriber line for terminals in an integrated-service digital communications network

Abstract: Instead of an S interface, a power-fed digital telephone terminal (CTE-T) is provided which is directly connected to the two-wire subscriber line (Z-TL) and contains a full-duplex transmission device for a two-wire bus (Z-DB) to which the remaining terminals (TG, DT) are connected.

Wireless telecommunications based subscriber terminal with monitor facility

Abstract: A subscriber station of a wireless telecommunications system includes a transceiver 24 for wireless communication 26 with a central station and for processing signals for transmission and/or received signals. The transceiver is connected via a link 28 to a power supply unit 30 for connection, via network terminal unit 32, to one or more outlets for user telecommunications equipment 34,36,38. The link carries telephone call data for the telecommunication equipment and subscriber station control data in accordance with an internal protocol. The internal protocol control data comprises operational status parameters of the subscriber station. The provision of internal protocol control data on a link between the transmitter/receiver and the supply unit thus provides a point of access for monitoring the operational status of the subscriber station. This access point may also be used to invoke a system installation/configuration routine which may then be effected via the subscriber's telephone keypad.

Method and apparatus for digital subscriber line transfer

Abstract: VDSL (Very-high-data-rate Digital Subscriber Line) technology uses at least one downlink frequency band (D1, D2) for conveying information from a data network to a subscriber's transceiver unit. At some sites VDSL technology cannot be used because no standardized uplink frequency band (U1, U2) is usable. The invention solves this problem by using at least one non-VDSL uplink frequency band (N1) for conveying information from the subscriber's transceiver unit to the data network.

The impact of new technologies on subscriber loop networks

Abstract: March 1987-Voi. 25, No. 3 IEEE communications Magazine I S D N trials are underway and commercial service may soon be a reality. Indeed, some of the presenters in this area treated ISDN as a fait accompli, declared victory, and had set their sights on Broadband ISDN. Contrast this with the user view, however, expressed by R. Sedgewick of the Bank of America, that private networks will be more cost effective than CentrexASDN; the latter is more appropriate to reach low volume portions of the Bank of America’s business. T h e commercial successes of ISDN’s technologies certainly lie ahead! Digital loop carrier presentations stirred considerable interest. The amazing statistic delivered by Bell South was that 50 percent of their line growth was on digital loop carrier, and half of that on fiber! Automated, remotely provisioned systems had indeed revolutionized the loop plant in North America, and served as a model for the rest of the world in the future.