Showing papers on "High-bit-rate digital subscriber line published in 2011"

Market Coverage and Service Quality in Digital Subscriber Lines Infrastructure Planning

Abstract: Digital subscriber lines (xDSL) belong to a family of technologies that provide the ability to transmit digital data over local telephone (copper) infrastructure. As the second most popular broadband platform in the United States, it is estimated that over twenty-five million xDSL lines are in service, capturing nearly 30 percent of the U.S. broadband market. While the service range of xDSL is somewhat limited, often extending to a maximum of 18,000 feet from a central office (CO), available bandwidth also decays as distance increases from the CO. As a result, there are often marked disparities in the quality of xDSL service within market areas. This article proposes a bi-objective location model for maximizing both service coverage and quality of coverage in siting digital subscriber line access multiplexers (DSLAMs). An application of the developed model highlights important implications for telecommunication policy.

Digital Subscriber Line

Abstract: Das Kapitel DSL gibt eine Ubersicht uber die Standards und deren Varianten, beschreibt die physische OSI-Schicht 1 bis zur Netzwerkschicht 3, die Modulationsvarianten und die Protokolle fur die Ubertragung. Gezeigt wird auch die Flexibilitat von ADSL und VDSL, sich an die Leitungseigenschaften anzupassen. ADSL und VDSL sind Losungen fur die Datenubertragung uber bestehende Zweidrahtleitungen und streng auf die Leitungshierarchien angepasst. Es sind hohe Datenraten moglich, doch setzen langere Leitungen klare Grenzen.

DSL (Digital Subscriber Line)

Abstract: e n t r a l O f f i c e C u s t o m e r P r e m i s e s I T U T i s r e s p o n s i b l e f o r t h e d e v e l o p m e n t o f R e c o m m e n d a t i o n s i n t h e a r e a o f " T r a n s c e i v e r s f o r c u s t o m e r a c c e s s a n d i n p r e m i s e s p h o n e l i n e n e t w o r k i n g s y s t e m s o n m e t a l l i c p a i r s " . F o r m o r e d e t a i l e d i n f o r m a t i o n , s e e a l s o R e c o m m e n d a t i o n G . 9 9 5 . 1 , " O v e r v i e w o f d i g i t a l s u b s c r i b e r l i n e ( D S L ) R e c o m m e n d a t i o n s " .

System and method for measuring DSL transfer parameters

Abstract: The method involves arranging a digital subscriber line (3) between a switching center (7) i.e. digital subscriber line access multiplexer, of a network operator, and a subscriber connection. Data for measuring a transfer parameter is exchanged between a measuring server (9) and the subscriber connection, where the measuring server is assigned to the switching center. The data for measuring the transfer parameter is received and transmitted from a digital subscriber line router (4). A computer program is transferred to the digital subscriber line modem via online. An independent claim is also included for a system for measuring transfer parameters of a digital subscriber line.

Method for diagnosing the wiring quality of a very-high-bit-rate digital subscriber line and device for implementing said method

Abstract: The present invention relates to a diagnosis device (10) for testing in the home of a user the wiring quality for very-high-bit-rate signals carried by a private telephone network (12) (wiring in the home of the user of said network). Said test device enables network installation and maintenance technicians to immediately confirm, in particular, the quality of the receiving and transmitting connections with regard to the use thereof for the VDSL, the type of fault detected, and the location of the fault in the wiring.