Showing papers on "High-bit-rate digital subscriber line published in 2003"

Method and system for supporting multiple services with a subscriber optical interface located outside a subscriber's premises

Abstract: A system and method for tuning a broadcast receiver such as a television set with a subscriber optical interface (SOI) that can be located outside a subscriber's premises and can be adjacent to the subscriber's premises. For example, a subscriber optical interface can be mounted on a side of a home which converts optical data and optical video signals received from an optical waveguide to electrical signals. Because of the hardware contained in the subscriber optical interface, any video processing hardware that is present within the subscriber's premises for tuning video programs can be reduced or substantially eliminated without sacrificing a range of services available to a subscriber from a fiber-to-the-home optical network.

Service-quality management system for asymmetric digital subscriber line

Abstract: A service-quality management system for an asymmetric digital subscriber line ADSL, while the ADSL service is provided to each subscriber terminal of the ADSL network, comprising: a digital subscriber-line access multiplexor DSLAM, connected with numerous subscriber modems coupling with each corresponding subscriber terminal, collecting a subscriber line based on asynchronous transfer mode ATM, checking link states of each subscriber modem in real time to detect link up/down data, and outputting a message of link up/down data including the detected data and the associated operation parameter data; and a network management device performing function of storing, managing, and outputting the link up/down data and the associated operation parameter data of each subscriber modem included in the message of link up/down data from the DSLAM. According to the present invention, the service quality management system for ADSL prevents a problem of the ADSL network, such as transmission troubles and copes with a generated trouble rapidly, which results in improving service qualities of the ADSL.

Multiple channel system for a twisted pair telephone wire local loop system

Abstract: Example multiple channel systems for a twisted pair telephone wire local loop system are disclosed. An example method includes implementing, via a digital filter at a subscriber gateway, a frequency translation received from a first controller of a switching office in response to a bandwidth allocation request, wherein the frequency translation moves a signal to an available frequency band identified by the first controller of the switching office; operating a second controller at the subscriber gateway to control the digital filter; and transmitting a plurality of frequency division multiplexed signals via a first transceiver configured to send and receive via multiple independent channel located at the subscriber gateway.

Broadband Sigma-Delta A/D Converters

Abstract: xi

Composite voice service terminal apparatus, and method for using the same

Abstract: A composite voice service terminal apparatus enables a user or subscriber to selectively use Subscriber Line Interface Circuit/Subscriber Line Audio processing Circuit (SLIC/SLAC), voice digital signal processor (DSP), processor, asymmetric digital subscriber line digital signal processor (ADSL DSP), asymmetric digital subscriber line analog front end (ADSL AFE), multiplexer (MUX) for outputting data to one of the channels from the digital tone generating unit and the voice digital signal processor, digital tone generating unit for including sources of a dial tone, ring back tone, busy tone, and guide tones of voice over Internet protocol (VoIP), voice over digital subscriber line (VoDSL), and voice over multi-service broadband networks (VoMBN), generating a tone corresponding to a selected mode, and transmitting the tone to the Subscriber Line Interface Circuit/Subscriber Line Audio processing Circuit through the multiplexer, and a relay switch to maintain an on state so that the user can use a general phone, and receive an off signal from the processor and interrupt a general phone line when the user has pressed a specific digit for digital network services.

Method for identifying a telecommunications subscriber

Abstract: The invention relates to a method for identifying a telecommunications subscriber. According to said method, a call from a second telecommunications device (MFG2) of a second telecommunications subscriber is first signalled to a first telecommunications device (MFG1) of a first telecommunications subscriber. Device information (GI1), which indicates the type of subscriber data that the first telecommunications device is configured to process, is then sent from a first to a second telecommunications device. Subscriber data (TD2) is subsequently transmitted from the second to the first telecommunications device, in accordance with the information from the first device. It is also conceivable that device information (GI2) can be transmitted from the second to the first telecommunications device, in accordance with which subscriber data (TD1) can finally be transmitted from the first to the second telecommunications device. The use of device information that is exchanged between two telecommunications devices and indicates which subscriber data should be transmitted to the respective other telecommunications device thus permits a reduction in the data flow between two telecommunications devices with respect to subscriber data, as only the desired subscriber data is transmitted.

High-speed digital subscriber line (hdsl) wander reduction utilizing minimums

Abstract: An apparatus and method are described that allows for improved wander jitter reduction in communication devices and associated communication links, in particular on HDSL communication devices and links. The improved device apparatus and method detects the current data rate offset of the HDSL data rate being utilized and the data rate of the datastream being transmitted through the HDSL communication link and allows for the transmitting HDSL communication device to adjust the HDSL data rate to promote instantaneous data rate offsets that are close to wander jitter minimum points. The improved device apparatus and method also allows for the characterization of communication devices for their specific wander jitter low activity points by sweeping the input data rate being transmitted at differing HDSL data rates.

Telephone conference system has communications exchange station with subscriber authentication device for comparing transmitted and stored codes before connection establishment

Abstract: The system has a communications exchange for coupling telecommunications devices and that has a subscriber data memory in which transmission codes of telecommunications devices are stored for transmission by the telecommunications devices when the exchange is dialed and that identify the telecommunications devices. The exchange has a subscriber authentication device for comparing transmitted and stored codes before connection establishment. The system has a communications exchange (1) for coupling telecommunications devices (2) with each other and that has a subscriber data memory (5) in which transmission codes of telecommunications devices are stored for transmission by the telecommunications devices when the exchange is dialed and that identify the telecommunications devices. The communications exchange has a subscriber authentication device (7) for comparing transmitted and stored codes before connection establishment. Independent claims are also included for the following: a method of authenticating a subscriber to a telephone conference and a method of conducting a telephone conference.

Method for identifying a receiving capability of a telecommunications device

Abstract: The present invention relates to a method for identifying a telecommunications subscriber. According to the method, a call from a second telecommunications device (MFG2) of a second telecommunications subscriber is first signaled to a first telecommunications device (MFG1) of a first telecommunications subscriber. Device information (GI1), which indicates the type of subscriber data that the first telecommunications device is configured to process, is then sent from a first to a second telecommunications device. Subscriber data (TD2) is subsequently transmitted from the second to the first telecommunication device, in accordance with the information from the first device. It is also conceivable that device information (GI2) can be transmitted from the second to the first telecommunications device, in accordance with which subscriber data (TD1) can finally be transmitted from the first to the second telecommunications device. The use of device information that is exchanged between two telecommunications devices and indicates which subscriber data should be transmitted to the respective other telecommunication device thus permits a reduction in the data flow between two telecommunications devices with respect to subscriber data, as only the desired subscriber data is transmitted.

Telecommunication system using digital-subscriber lines coexisting with TCM-ISDN lines

Abstract: Provided is an asymmetric digital subscriber line (ADSL) system that communicates via digital subscriber line (DSL) routing through a bundle of cables including a communication line for time compression multiplexing-integrated services digital network (TCM-ISDN) system that is synchronized with a TCM timing reference (TTR) signal. The ADSL system is synchronized with a data signal inputted after the TTR indication signal.

Method of operating, administrating and maintaining very high bit rate digital subscriber line

Abstract: Disclosed is an operation, administration, and maintenance method for very high bit rate digital subscriber line, which has a simplified frame structure, can be easily modified, and can provide various information. In very high bit rate digital subscriber line system which performs a link set between central office and customer premises equipment connected to each other by a very high bit rate digital subscriber line by transmitting/receiving very high bit rate digital subscriber line overhead control frame having operation code, unique operation codes are identically set at the central office and the customer premises equipment. Unique operation codes prescribe all kinds of messages to be transmitted between central office and customer premises equipment. Operation, administration, and maintenance for customer premises equipment is performed by exchanging messages by central office and customer premises equipment in very high bit rate digital subscriber line overhead control frames. Very high bit rate digital subscriber line overhead control frames each has operation code which prescribes corresponding message among set operation codes.

System for measuring the effect of an ADSL splitter on an ISDN network

Abstract: Problems arise when using an Integrated Service Digital Network infrastructure (6) for providing Asymmetrical Digital Subscriber Line technology. These problems do not always occur but depend on the distance between the end-user location (12) and the central location (11), and the type of network termination (3), and result in the impossibility for the end-user to make voice calls or to send data. The problems are caused by the Asymmetrical Digital Subscriber Line splitters (4) and (7), which change the transmission characteristics of the Integrated Service Digital Network infrastructure (6) between the end-user location (12) and the central location (11). The transmission characteristics that are changed by the Asymmetrical Digital Subscriber Line splitters (4) and (7) are impedance, propagation time and insertion loss. The deviation is frequency-dependent and falls outside the internationally-defined ranges for these transmission characteristics.

Method for transmission of useful information as service to several subscriber stations, requires radio network control device and subscriber center to hold service-specific key/code

Abstract: A method for transmitting useful information in which at least one base station and at least one subscriber station, are interconnected via a radio communication interface. The radio network control device and the subscriber station hold a service-specific key/code which comprises the authorization for use of the service. An Independent claim is given for a radio communication system for transmission of useful data as a service for several subscriber stations.

A first person IP over HDSL case study

Abstract: As many authors have articulated, the "last mile problem" is often cited as a persistent engineering obstacle in deploying residential broadband solutions. Additionally, some academic researchers may require completely unfiltered Internet access, short network paths to Internet2, SIP, QoS, IPv6, and other functionality that may not be offered by commercial ISPs. This paper describes how the author designed and developed a high-speed (>2 Mb/sec), residential IP connection by using a four-wire HDSL circuit terminated directly at an academic institution. Technologically, this was done by extending the Ethernet frame beyond the institution's physical boundaries with transparent MAC-layer forwarding controlled by relatively low-cost, dedicated HDSL transceivers. The process was strategically planned, documented, tested, and managed across seven individuals in four disparate organizations and the monthly cost per throughput capacity is significantly lower than typical ISPs in the region.