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Institution

AT&T Teleholdings, Inc.

About: AT&T Teleholdings, Inc. is a based out in . It is known for research contribution in the topics: Automatic number identification & Telephone line. The organization has 258 authors who have published 209 publications receiving 8098 citations.


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Book
29 Dec 1998
TL;DR: In this article, the authors present an overview of a generic DSL architecture, including three-port networks for DSLs, as well as several configurations to support ATM transmission convergence in an ADSL environment.
Abstract: 1. DSL Fundamentals. Alternatives to DSLs: Fiber, Wireless, and Coax. Worldwide Extent. Voice-Band Modems and DSLs. Transmission Modes. DSL Terminology. Rate Versus Reach. Crosstalk. Enabling and Disabling Forces. Applications. Evolution of Digital Transmission. 2. Types of DSLs. DSL Design Margin. DSL Precursors. Basic Rate ISDN. HDSL. ADSL. VDSL. 3. Twisted-Pair Transmission. Twisted-Wire-Pair Origins. Telephone Network and Loop Plant Characteristics. Line Powering. Sealing Current. Transmission Line Characterization. Noises. Spectral Compatibility. More Two-Port Networks. Three-Port Networks for DSLs. References. 4. Comparison with Other Media. Fiber-to-the-Home. Coax and Hybrid Fiber Coax. Wireless Alternatives. Satellite Services. References. 5. Transmission Duplexing Methods. Four-Wire Duplexing. Echo Cancellation. Time-Division Duplexing. Frequency-Division Multiplexing. References. 6. Basic Digital Transmission Methods. Basic Modulation and Demodulation. Baseband Codes. Passband Codes. References. 7. Loop Impairments, Solutions, and DMT. Intersymbol Interference. Multichannel Line Codes. Trellis Coding. Error Control. References. 8. Initialization, Timing and Performance. Initialization Methods. Adaptation of Receiver and Transmitter. Measurement of Performance. Timing Recovery Methods. References. 9. Operations, Administration Maintenance, and Provisioning. OAM&P Features. Loop Qualification. 10. DSL in the Context of the ISO Reference Model. The ISO Model. Theory and Reality. The Internet Protocol Suite. ATM in the Seven-Layer Model. 11. ADSL: The Bit Pump. ADSL System Reference Model. ATU-C Reference Model. ATU-R Reference Model. Specific Configurations to Support ATM. Framing. Operations and Maintenance. Initialization. Reference. 12. ATM Transmission Convergence on ADSL. Functions of ATM Transmission Convergence. Transmission Convergence in an ADSL Environment. Reference. 13. Frame-Based Protocols over ADSL. PPP over a Frame-Based ADSL. FUNI over ADSL. Reference. 14. ADSL in the Context of End-to-End Systems. An Overview of a Generic DSL Architecture. Potential ADSL Services and the Service Requirements. Specific Architectures for Deploying ADSL in Different Business Models. Several ADSL Architectures. References. 15. Network Architecture and Regulation. Private Line. Circuit Switched. Packet Switched. ATM. Remote Terminal. Competitive Data Access Alternatives. Regulation. 16. Standards. ITU. Committee T1. ETSI. ADSL Forum. ATM Forum. DAVIC. IETF. EIA/TIA. IEEE. The Value of Standards and Participation in Their Development. Standards Process. Appendix A: Glossary. Appendix B: Selected Standards and Specifications. Appendix C: Selected T1E1.4 Contributions and ADSL Forum Technical Reports (found on website). Index.

761 citations

Patent
03 Feb 1999
TL;DR: In this paper, a virus screening method is described, which includes routing a call between a calling party and a called party of a telephone network, receiving computer data from a first party of the calling party, and detecting a virus in the computer data.
Abstract: A virus screening method includes steps of routing a call between a calling party and a called party of a telephone network, receiving computer data from a first party of the calling party and the called party, and detecting a virus in the computer data. In response to detecting the virus, a step of inhibiting communication of at least a portion the computer data to a second party of the calling party and the called party is performed. A virus screening system is also disclosed.

565 citations

Journal ArticleDOI
TL;DR: Transdermal rotigotine significantly improved “off” time in subjects with Parkinson disease not optimally controlled with levodopa and was safe and well tolerated, with typical dopaminergic side effects and occasional application site reactions.
Abstract: Background: In patients experiencing motor fluctuations, a major treatment challenge is the reduction of “off” time, particularly upon awakening. Rotigotine (Neupro) is a novel dopaminergic agonist with 24-hour transdermal delivery. Methods: A randomized, double-blind, placebo-controlled trial (PREFER Study) was performed to assess efficacy and safety with two targeted transdermal doses of rotigotine in subjects with advanced Parkinson disease with ≥2.5 hours of daily “off” time. Subjects were randomized to receive placebo patches (n = 120) or rotigotine up to either 8 mg/24 hours (n = 120) or 12 mg/24 hours (n = 111). The primary efficacy measures compared changes from baseline to the end of week 24 in the number of daily hours “off” and responder rates for subjects achieving ≥30% reduction in “off” time. Results: Compared to placebo, there were significant decreases in mean “off” time of 1.8 hours/day for the rotigotine 8 mg/24 hours group and 1.2 hours/day for the 12 mg/24 hours group. For rotigotine 8 and 12 mg/24 hours groups, ≥30% responder rates were 56.6% and 55.1% compared to the 34.5% placebo response. “On” time without dyskinesia after awakening was more than doubled in both rotigotine treatment groups vs placebo. Drug-related adverse effects included typical dopaminergic side effects, which were generally mild/moderate in intensity. Patch application site reactions including erythema and pruritus were mild to moderate and transient in the majority of instances. Conclusions: Transdermal rotigotine significantly improved “off” time in subjects with Parkinson disease not optimally controlled with levodopa and was safe and well tolerated, with typical dopaminergic side effects and occasional application site reactions.

253 citations

Journal ArticleDOI
TL;DR: A method of rotation-invariant texture classification based on a complete space-frequency model is introduced, and the essential characteristics of a texture sample, its macrofeatures, are derived from the estimated selected parameters of the micromodel.
Abstract: A method of rotation-invariant texture classification based on a complete space-frequency model is introduced. A polar, analytic form of a two-dimensional (2-D) Gabor wavelet is developed, and a multiresolution family of these wavelets is used to compute information-conserving microfeatures. From these microfeatures a micromodel, which characterizes spatially localized amplitude, frequency, and directional behavior of the texture, is formed. The essential characteristics of a texture sample, its macrofeatures, are derived from the estimated selected parameters of the micromodel. Classification of texture samples is based on the macromodel derived from a rotation invariant subset of macrofeatures. In experiments, comparatively high correct classification rates were obtained using large sample sets.

248 citations

Patent
14 Jan 2004
TL;DR: In this article, a method and system for routing a call to a called party's landline or wireless communication unit based on the availability of the wireless communications unit is provided, which operate automatically (without called party intervention) before a call is terminated at the landline communication unit.
Abstract: A method and system are provided for routing a call to a called party's landline or wireless communication unit based on the availability of the wireless communication unit. A call placed to a called party's landline communication unit is routed to the called party's wireless communication unit if the wireless communication unit is determined available, otherwise, the call is routed to the called party's landline communication unit. Unlike past attempts to facilitate communication with a called party having wireless and landline communication units, these preferred embodiments operate automatically (without called party intervention) before a call is terminated at the landline communication unit and are responsive to the availability of the called party's wireless communication unit. Further, there preferred embodiments do not rely on complex, pre-determined hunting sequences or expensive adjunct customer premises equipment.

242 citations


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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
20211
20201
20185
20172
20164
20153