Topic
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.
Papers published on a yearly basis
Papers
More filters
•
23 May 1996TL;DR: In this paper, the authors describe a communication system for ISDN switching systems with ISDN telephones as terminals, in which the telecommunication parameters belonging to the subscriber call number are transmitted to the second subscriber terminal.
Abstract: A communication system includes subscriber terminals which can be coupled via at least one switch, and to which subscriber terminals, several call numbers can be assigned for which telecommunication parameters are definable. The subscriber terminals each store respective telecommunication parameters. In the case of a change of assignment of a subscriber call number from a first subscriber terminal to a second subscriber terminal, the telecommunication parameters belonging to the subscriber call number are transmitted to the second subscriber terminal. The communication system is preferably implemented in ISDN switching systems with ISDN telephones as terminals.
19 citations
••
14 Nov 1994TL;DR: The problem of evaluating the amount of NEXT noise on ADSL receivers due to DSL, HDSL, E1 and POTS disturbers is considered, and mathematical expressions for the power spectral density (PSD) of the above disturbers are provided and an expression for evaluating NEXT noise PSD is presented.
Abstract: One of the major concerns related to the introduction of asymmetric digital subscriber line (ADSL) systems is the compatibility between such systems and transmission systems already deployed in the access network. In particular, three main noise sources must be considered, namely, near-end crosstalk (NEXT), far-end crosstalk (FEXT) and impulsive noise. The problem of evaluating the amount of NEXT noise on ADSL receivers due to DSL, HDSL, E1 and POTS disturbers is considered. Firstly, mathematical expressions for the power spectral density (PSD) of the above disturbers are provided and an expression for evaluating NEXT noise PSD is presented. Finally, the results obtained considering different scenarios (i.e., low-noise, high-noise and worst case NEXT coupling), are reported and discussed with the aim of providing useful information and guidelines for the introduction of ASDL systems in the access network. >
19 citations
•
12 Aug 1998TL;DR: An asymmetric data transmission apparatus using asymmetric digital subscriber lines, which connects a high-speed data network to telephone subscriber lines in response to a demand of a subscriber, is provided in this paper.
Abstract: An asymmetric data transmission apparatus using asymmetric digital subscriber lines, which connects a high-speed data network to telephone subscriber lines in response to a demand of a subscriber, is provided. The apparatus contains subscriber line connectors which are connected to the telephone subscriber lines, which include activation sensors that receive activation signals from remote units via the subscriber lines, and which receive output signals from the remote units and output corresponding analog signals. Also, a particular subscriber line connector inputs a particular output signal from a particular remote unit via a particular telephone subscriber line and outputs a particular analog signal. The apparatus also contains subscriber modems which are connected to digital lines of the network, which modulate output digital signals transmitted from any the network via the digital lines into output analog signals, and which demodulate input analog signals into input digital signals and supply the input digital signals to the network. Also, a particular subscriber modem inputs a particular input analog signal and outputs a particular input digital signal. The apparatus also includes a connection circuit which selectively connects the particular subscriber modem to the particular subscriber line connector and which inputs the particular received analog signal and outputs the particular input analog signal.
19 citations
••
TL;DR: It was found that the near-end crosstalk (NEXT) loss of Taiwan's subscriber loops is about 10 dB worse than that of US local loops, and a corresponding new foam-skin PIC cable is proposed to reduce the NEXT loss.
Abstract: About 2800 lines out of a total of 8,500,000 subscriber lines in Taiwan have been sampled and characterized. Various kinds of physical compositions and transmission characteristics were investigated and measured. It was found that the near-end crosstalk (NEXT) loss of Taiwan's subscriber loops is about 10 dB worse than that of US local loops. A corresponding new foam-skin PIC cable is proposed to reduce the NEXT loss. The new type of cable will be used to replace the paper cable and old foam-skin PIC cable step-by-step. Based on the measured data, the feasibility of HDSL (high bit rate digital subscriber line) service in Taiwan is studied. To improve the HDSL service distance via the existing subscriber lines, several cable models are discussed and suggested. >
18 citations
•
10 May 2004
TL;DR: In this article, a method for providing television services from a head-end to subscriber premises and includes receiving by a first subscriber terminal via a first transmission link coupled to the first subscriber terminals, a first television service transmitted from the head end.
Abstract: A method for providing television services from a head-end to subscriber premises and includes receiving by a first subscriber terminal via a first transmission link coupled to the first subscriber terminal, a first television service transmitted from the head-end. System information data specifying attributes of at least one local television channel is transmitted to a second subscriber terminal coupled to the first subscriber terminal via a second transmission link. The at least one local television channel has a frequency that is unused on the first transmission link by the head-end. The first television service is transmitted by the first subscriber terminal, on one of the at least one local television channel via the second transmission link, to the second subscriber terminal located at the subscriber premises.
18 citations