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ISDN Digital Subscriber Line
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Encyclopedia results for ISDN Digital Subscriber Line

ISDN Digital Subscriber Line





Encyclopedia results for ISDN Digital Subscriber Line

  1. ISDN digital subscriber line

    DSL technologies ISDN Digital Subscriber Line IDSL uses Integrated Services Digital Network ISDN based technology to provide a data communication channel across existing copper telephone lines at a rate of 144 kbit s, slightly higher than a bonded dual channel ISDN connection at 128kbit s. The digital transmission bypasses the telephone company s central office equipment that handles analogue signals. IDSL uses the ISDN grade loop without Basic Rate Interface in ISDN transmission mode. The benefits of IDSL over ISDN are that IDSL provides always on connections and transmits data via a data network rather than the carrier s voice network. ref cite press release url http www.cisco.com en US tech tk175 tk349 technologies q and a item09186a00800946d3.shtml title IDSL Frequently Asked Questions date February 26, 2008 publisher Cisco ref IDSL also avoids per call fees by being generally billed at a flat rate. IDSL is not available in all countries. ISDN digital subscriber line IDSL is a cross between ISDN and xDSL. It is like ISDN in that it uses a single wire pair to transmit full duplex data at 128 kbit s and at distances of up to RRD range. Like ISDN, IDSL uses a 2B1Q line code to enable transparent operation through the ISDN U interface. Finally, the user continues to use existing Customer premises equipment CPE ISDN BRI terminal adapters, bridges, and routers to make the CO connections. The big difference is from the carrier s point of view. Unlike ISDN, IDSL does not connect through the voice switch. A new piece of data communications equipment terminates the IDSL connection ... of more than five million ISDN users as an initial market. References references DEFAULTSORT Isdn Digital Subscriber Line Category Digital subscriber line Category Integrated Services Digital Network telecomm stub de ISDN Digital Subscriber Line es IDSL fr IDSL it IDSL pl IDSL pt IDSL ru IDSL ... no longer has access to ISDN signaling or voice services. But for Internet service ...   more details



  1. Symmetric digital subscriber line

    Refimprove date December 2008 DSL technologies Symmetric digital subscriber line SDSL can have two meanings In the wider sense it is a collection of Internet access technologies based on Digital subscriber line DSL that offer symmetric Bandwidth computing bandwidth Upstream networking upstream and downstream computer science downstream . It is considered the opposite of asymmetric digital subscriber line ADSL technologies where the upstream bandwidth is lower than the downstream bandwidth. In the narrow sense SDSL is a particular DSL variant that supports data only on a single line and does not support analog calls. SDSL technology SDSL is a rate adaptive digital subscriber line DSL variant with T carrier T1 E carrier E1 like data rates T1 1.544 Data rate units Megabit per second Mbit s , E1 2.048 Mbit s . It runs over one pair of copper wires, with a maximum range of convert 10000 ft m . It cannot co exist with a conventional voice service on the same pair as it takes over the entire bandwidth. ref cite web url http www.cisco.com en US docs internetworking technology handbook DSL Dig .... It is the predecessor of single pair high speed digital subscriber line G.SHDSL which was standardized .... ref cite web url http www.itu.int rec T REC G.991.2 en title G.991.2 Single pair high speed digital subscriber line SHDSL transceivers publisher ITU T accessdate 2008 12 04 ref SDSL is often confused with G.SHDSL and High bit rate Digital Subscriber Line HDSL ref cite web url http www.blackbox.co.uk ... publisher Cisco Systems, Inc. accessdate 2008 12 03 ref See also ISDN List of device bandwidths References Reflist DEFAULTSORT Symmetric Digital Subscriber Line Category Digital subscriber line Category ITU T recommendations Compu network stub bs SDSL de Symmetric Digital Subscriber Line es SDSL fr Symmetric Digital Subscriber Line ko SDSL it SDSL nl SDSL no SDSL pl Symmetric Digital Subscriber Line ... performance of a leased line . ref cite web url http www.cisco.com en US docs internetworking ...   more details



  1. Rate-Adaptive Digital Subscriber Line

    Unreferenced date December 2008 for RE ADSL2 ITU G.992.3 Annex L DSL technologies Rate Adaptive Digital Subscriber Line RADSL is a variation of Asymmetric Digital Subscriber Line ADSL technology. In RADSL the DSL modem adjusts the upstream networking upstream Bandwidth signal processing bandwidth to create a wider frequency band for the downstream traffic. Using this technique the line is more tolerant of errors caused by Noise physics noise and signal loss. As the frequency is adjusted, the upstream bandwidth may be markedly decreased if there is a large amount of line noise or signal degradation this may reduce the upstream bit rate to as little as 64 kbit s the same speed as a single ISDN B channel . See also Digital subscriber line DSL Single Pair High speed Digital Subscriber Line SHDSL Category Digital subscriber line de Asymmetric Digital Subscriber Line Aushandlung fr Rate Adaptive Digital Subscriber Line pl Rate Adaptive Digital Subscriber Line pt RADSL ru RADSL ...   more details



  1. Multi-rate symmetric digital subscriber line

    Unreferenced stub auto yes date December 2009 DSL technologies Multi rate symmetric DSL MSDSL is a digital subscriber line technology with a maximum distance of 8,800  m 29,000  ft . It is capable of multiple transfer rates, as set by the Internet service provider , typically based on the service and or price. The maximum speed in both directions is about 2 Mbit s. Technology MSDSL is based on 2B1Q transmission with a capacity of 2.32 Mbit s. The bandwidth is split between a full E carrier E1 payload 2.048 Mbit s , with the remaining bandwidth accommodating up to three voice channels or two ISDN channels. Additional bandwidth is used for management purposes. Transmission over the single pair requires echo cancellation and adaptive equalizers in order to achieve the maximum range at a specific rate. For each user rate, the modem changes the 2B1Q transmission rate, employing different filters and equalizer settings. The modem s adaptive setting is determined during its initial use, and continues constantly during operation. DEFAULTSORT Multi Rate Symmetric Digital Subscriber Line Category Digital subscriber line Compu network stub ...   more details



  1. Digital subscriber line access multiplexer

    subscriber line ADSL Broadband Internet access Broadband Remote Access Server BRAS Cable modem termination system analogous device for CATV ISDN digital subscriber line IDSL Symmetric digital subscriber line SDSL Symmetric high speed digital subscriber line SHDSL Triple play telecommunications Very high bit rate digital subscriber line VDSL Very high bitrate digital subscriber line 2 VDSL2 References ... A digital subscriber line access multiplexer DSLAM , often pronounced dee slam is a network device, often ... customer digital subscriber line DSL interfaces to a high speed digital communications channel using multiplexing techniques. ref citeweb title Digital Subscriber Line Access Multiplexer DSLAM url http ... and Asymmetric Digital Subscriber Line 2 Plus ADSL2 technology and maximum data rate. Local conditions ... Digital Subscriber Line Access Multiplexer . User traffic is mostly IP based. Traditional 20th ... subscriber line ca DSLAM cs DSLAM de Digital Subscriber Line Access Multiplexer et DSL p rdusmultiplekser el Digital subscriber line access multiplexer es DSLAM fa fr Digital subscriber ... nl DSLAM ja DSLAM no DSLAM pl Digital Subscriber Line Access Multiplexer pt Multiplexador de Acesso ... in order to move data at the maximum connection rate capability of the subscriber s physical line ...Diagram was included in the Role section, showing where the DSLAM sits on the path from the DSL subscriber ... mile LM . Telephone exchange Main distribution frame MDF a wiring rack that connects outside subscriber ... with the service provider s DSLAM DSLAM a device for DSL service. The DSLAM port where the subscriber ... to which it is connected may take advantage of enhanced telephone voice and data line signaling ... within a neighborhood serving area interface , sometimes in conjunction with a digital loop carrier ... subscriber s DSL modem . This modem functionality is integrated into the DSLAM itself instead of being ..., a DSLAM s integrated DSL modems usually have the ability to probe the line and to adjust themselves ...   more details



  1. High-bit-rate digital subscriber line

    Cleanup date August 2010 DSL technologies High bit rate digital subscriber line HDSL was the first DSL technology to use a higher frequency spectrum of copper, twisted pair cables. HDSL was developed in the US, as a better technology for high speed, synchronous circuits typically used to interconnect ... technologies, called HDSL2 and symmetric digital subscriber line SDSL . HDSL2 offers the same data ... for the entire HDSL family of protocols. See also Asymmetric digital subscriber line Symmetric digital subscriber line Digital subscriber line Very high bit rate digital subscriber line External links http www.itu.int rec T REC G.991.1 en ITU T Recommendation G.991.1 High bit rate Digital Subscriber Line HDSL transceivers http www.commsdesign.com main 1999 08 9908feat2.htm HDSL Primer http www.thehistoryof.net history of dsl.html History of DSL DEFAULTSORT High Bit Rate Digital Subscriber Line Category Digital subscriber line bs HDSL ca High Data Rate Digital Subscriber Line de High Data Rate Digital Subscriber Line es L nea de abonado digital de alta velocidad binaria fr High bit rate Digital Subscriber Line it HDSL he DSL DSL pl High bit rate Digital Subscriber Line pt HDSL ru HDSL sk High Data Rate Digital Subscriber Line ..., using Digital Signal 1 T1 lines. HDSL service types include HDSL1, HDSL2 and HDSL4 and are typically ... Mbit s . These circuits were originally carried using a line code called alternate mark inversion AMI . Later the line code used was B8ZS . AMI did not have sufficient range, requiring the application ... trouble such as inferior splices and backhoe fade . These line codes at this bit rate give a bandwidth ... the problem were done in the US, using the line code 2B1Q . This modulation allowed for a 784 kbit ... line code, that reached the maximum bandwidth of 2.0 Mbit s using two pairs of copper. HDSL gave the telcos ... slow speed data links to customers. In this case, the line rate is still the full T1 E1 rate, but the customer ...   more details



  1. Single-pair high-speed digital subscriber line

    DSL technologies Single pair high speed digital subscriber line SHDSL is a form of digital subscriber line DSL , a data communications technology that enables faster data transmission over copper telephone line s than a conventional voiceband modem can provide. Compared to ADSL , SHDSL employs TC PAM modulation and frequencies that include those used by analog plain old telephone service POTS to provide equal transmit and receive i.e. symmetric data rates. As such, a frequency splitter, or DSL filter , cannot be used to allow a telephone line to be shared by both an SHDSL service and a POTS service at the same time. Support of symmetric data rates made SHDSL a popular choice by businesses for private branch exchange PBX , virtual private network VPN , web hosting and other data services. SHDSL features symmetrical data rates in both the upstream networking upstream and downstream networking downstream directions, from 192 kbit s to 2,312 kbit s of payload computing payload in 8 kbit s increments for one pair and 384 kbit s to 4,624 kbit s in 16 kbit s increments for two pairs of wires. The reach varies according to the local loop loop line rate rate and noise conditions more noise or higher rate means decreased reach and may be up to 3,000 meters. The two pair feature may alternatively ... in North America to refer to symmetric digital subscriber line . External links http www.itu.int rec T REC G.991.2 en ITU T Recommendation G.991.2 Single pair high speed digital subscriber line SHDSL transceivers Category Digital subscriber line Category ITU T recommendations de G.SHDSL es SHDSL fr SHDSL id G.SHDSL it Single Pair High speed Digital Subscriber Line pl Symmetric High speed Digital Subscriber Line pt G.SHDSL ru Single pair High speed Digital Subscriber Line fi SHDSL sv Single Pair High speed Digital Subscriber Line tr SHDSL ... channel unstructured , T carrier T1 or E carrier E1 full rate or fractional , multiple ISDN Basic ...   more details



  1. High bit rate digital subscriber line 2

    DSL technologies Refimprove date July 2007 HDSL2 is the 2nd generation of HDSL with a 6dB Noise Margin, put simply it is another way to provision a T 1 line, only this technology relies on fewer wires two instead of four and therefore costs less to set up. Category Digital subscriber line Internet stub ...   more details



  1. Very-high-bit-rate digital subscriber line

    by ITU in November 2001. Second generation systems very high speed digital subscriber line 2 VDSL2 ... in VDSL ITU G.993.1 VDSL 55 Mbit s 3Mbit s 2004 06 13 VDSL Very high speed digital subscriber line 2 ITU G.993.2 Very high speed digital subscriber line 2 VDSL2 100 Mbit s 100 Mbit s 2006 02 17 expand ... T Recommendation G.993.1 Very high speed digital subscriber line transceivers http www.uk bug.net ...?pd id 111&rp id 166 VDSL2 by PTCL in Pakistan DEFAULTSORT Very High Bitrate Digital Subscriber Line Category Digital subscriber line cs VDSL de Very High Speed Digital Subscriber Line et VDSL el Very high bitrate digital subscriber line es VDSL fr Very High Bitrate Digital Subscriber Line ko VDSL id VDSL it VDSL hu VDSL nl VDSL ja VDSL pl VDSL pt VDSL ru VDSL simple Very High Bitrate Digital Subscriber Line sk Very High Speed Digital Subscriber Line sl VDSL sr VDSL sv Digital Subscriber Line VDSL tr VDSL zh VDSL ... VDSL services. Japan s VDSL offerings use an FTTx access line network architecture. Malaysia Alcatel ... as such, a final link between the telephone line and their fiber to the building building s fiber .... The theoretical bandwidth right now is 100 100  Mbit s synchronous line downstream upstream, but is limited ... councils in the area Sheffield, Rotherham, Doncaster and Barnsley collectively known as Digital Region ... in Canberra is TransACT , who use VDSL for Digital TV, Internet and WAN applications over their FTTC ... internet.htm VDSL van KPN http www.ripwire.co.uk digital region RiPWiRE http www.digitalregionbroadband.co.uk ...   more details



  1. Very high speed digital subscriber line 2

    DSL technologies Very high speed digital subscriber line 2 VDSL2 is an access technology that exploits the existing infrastructure of copper wires that were originally deployed for plain old telephone service traditional telephone service . It can be deployed from central offices, from Fiber optic communication fiber optic connected Enclosure electrical cabinets located near the customer premises, or within buildings. It was defined in standard ITU T G.993.2 finalized in 2005. ref name press Cite ... and most advanced standard of digital subscriber line DSL broadband wireline communications. Designed ... through 2011. ref name spec Cite web title ITU T Recommendation G.993.2 Very high speed digital subscriber line transceivers 2 VDSL2 url http www.itu.int rec T REC G.993.2 en accessdate 22 September 2011 ref VDSL2 is an enhancement to very high bitrate digital subscriber line VDSL , Recommendation ... to augment its current Asymmetric Digital Subscriber Line 2 Plus ADSL2 capabilities over time ... Speed Digital Subscriber Line Broadband Internet access DOCSIS Fiber to the x Passive optical network ... Services Testing DSL DEFAULTSORT Very High Speed Digital Subscriber Line 2 Category ITU T recommendations G.993.2 Category Digital subscriber line de Very High Speed Digital Subscriber Line VDSL2 et VDSL2 el Very High Speed Digital Subscriber Line 2 es VDSL2 fr VDSL2 it VDSL2 mk VDSL2 nl VDSL2 pl Very High Speed Digital Subscriber Line 2 pt VDSL2 ru VDSL2 sk Very High Speed Digital Subscriber Line ... free broadband via a VDSL2 line to a roadside cabinet. The cabinets will be linked to Virgin ... s involvement under their own brand on 1 October 2010. Digital Region Ltd , an EU government backed ... services for business users and consumers across South Yorkshire. Origin Broadband joined the Digital ..., up to 40Mbit broadband, to residential customers on the Digital Region network. On April 18 2012 ... services, internet television and a phone line for 50 to 60 a month. ref name NZ Herald 10419276 cite ...   more details



  1. Digital Subscriber System No. 2

    Unreferenced stub auto yes date December 2009 Orphan date December 2009 Digital Subscriber Signalling System No.  2 DSS2 , as the successor to DSS1 , is also a digital signalling protocol D channel protocol used for the Broadband Integrated Services Digital Network B ISDN . Category Integrated Services Digital Network Telecomm stub de Digital Subscriber System No. 2 ...   more details



  1. Digital Subscriber System No. 1

    Unreferenced date December 2009 Digital Subscriber Signalling System No.  1 DSS1 , also known as Euro ISDN or E DSS1 European DSS1 , is a digital signalling protocol D channel protocol used for the Integrated Services Digital Network ISDN . The interface is also called NET3 for Basic rate interface BRI and NET5 for Primary rate interface PRI lines. Can also be called CTR4 . It is defined by ITU T I.411 ETS 300 102 . It supports Bearer Capability, Low Level Compatibility and High Level Compatibility, ANI, DNIS and redirected number signaling in both directions. DSS1 is a pan Europe an standard developed by ETSI . In 1989 , 26 network operators from 20 European countries decided to develop this standard to replace earlier national protocols such as FTZ 1 TR 6 or VN3 . DSS1 has been one of the keys to the success of the Integrated Services Digital Network ISDN within European countries as compared to, for example, the United States U.S. . Non European countries using DSS1 include Australia , Brazil , Iran , India , Israel , New Zealand , Pakistan , Peru , Singapore , South Africa , Sri Lanka , Taiwan , Palestine and the United Arab Emirates . The DSS1 protocol knows four different codesets for information elements. Codeset 0 regards to Q.931 , Codeset 5 to the ETSI standard, Codeset 6 for national applications and Codeset 7 for PBX applications. The most common Codeset is 0 Q.931. Category Integrated Services Digital Network de Digital Subscriber System No. 1 ...   more details



  1. ISDN (disambiguation)

    ISDN may refer to Integrated Services Digital Network ISDN Broadband Integrated Services Digital Network B ISDN ISDN album by The Future Sound of London Isosorbide dinitrate , the drug used in the treatment of angina pectoris disambig hu ISDN egy rtelm s t lap ...   more details



  1. Digital delay line

    A digital delay line is a discrete element in digital filter theory, which allows a signal to be delayed by a number of samples. If the delay is an integer multiple of samples digital delay lines are often implemented as circular buffer s. This means that integer delays can be computed very efficiently. The delay by one sample is notated math mathrm z 1 math and delays of math N math samples is notated as math mathrm z N math motivated by the role the z transform plays in describing digital filter structures. If a delay is not an integer of a sample additional filters are applied to account for the fraction of delay different from an integer. Hence delay lines with non integer delay are called fractional delay lines . ref Citation last Laakso first Timo I. author link last2 V lim ki first2 Vesa author2 link last3 Karjalainen first3 Matti last4 Laine first4 Unto K. publication date January 1996 date January 1996 title Splitting the unit delay tools for fractional delay filter design periodical IEEE Signal Processing Magazine edition volume 13 issue 1 pages 30 60 publication place place publisher id isbn doi 10.1109 79.482137 oclc url accessdate 2007 08 22 ref Digital delay lines are widely used building blocks in methods to simulate room acoustics , musical instruments and digital audio effects . ref Citation last Smith first Julius O. author link last2 Lee first2 Nelson author2 link publication date August 12 2007 date August 2007 title Computational Acoustic Modeling with Digital Delay url http ccrma.stanford.edu realsimple Delay Delay lines.html accessdate 2007 08 21 ref Digital waveguide synthesis shows how digital delay lines can be used as sound synthesis methods for various musical instruments such as string instruments and wind instruments . Sources reflist Category Digital signal processing electronics stub es L nea de retardo digital ru ...   more details



  1. Digital line graph

    File USGS logo.png thumb USGS Logo A Digital Line Graph DLG is a Cartography cartographic map feature represented in digital Vector graphics vector form that is distributed by the U.S. Geological Survey USGS . DLGs are collected from USGS maps and are distributed in large , intermediate and small scale with up to nine different categories of features, depending on the scale. They come in optional and Spatial Data Transfer Standard SDTS format and are topological structure topologically structured for use in mapping and geographic information system GIS applications Description File Susq sub.png thumb Map produced with DLG data DLGs are normally derived from USGS maps or USGS map related sources. DLGs are distributed at three different scales large scale, which normally correspond to the USGS 7.5 by 7.5 minute, 1 24,000 and 1 25,000 scale topographic quadrangle map series, 1 63,360 scale for Alaska and 1 30,000 scale for Puerto Rico intermediate scale, which are derived from the USGS 30 by 60 minute, 1 100,000 scale map series and small scale, which are derived from the USGS 1 2,000,000 scale sectional maps of the National Atlas of the United States . Large scale DLGs are usually cast on the Universal Transverse Mercator coordinate system UTM , but are sometimes cast on the State Plane rectangular coordinate system. Intermediate scale DLGs are sold in 30 by 30 minute sections that correspond to the east or west half of the 100K quadrangle map, and each of the 30 minute sections is distributed in four 15 by 15 minute cells and is cast on the UTM coordinate system. Small scale ... factsheets fs07896t.pdf USGS Fact Sheet, Digital Line Graphs ref Sources references External links http eros.usgs.gov Find Data Products and Data Available DLGs USGS Digital Line Graphs http eros.usgs.gov ..., are available in DLGs Public Land Survey System PLSS , Boundary line Boundaries BD , Transportation ..., the UTM ground coordinate system, and topological topology linkages contained in line, node and area ...   more details



  1. ISDN (album)

    Infobox album See Wikipedia WikiProject Albums Name ISDN Type Live album Artist The Future Sound of London Cover Futuresoundoflondon isdn cover.jpg Caption Second edition cover Released 5 December 1994 small limited small br 2 June 1995 small second small Recorded Earthbeat Studios Genre Ambient music Ambient , techno music techno , experimental music experimental Length 74 57 small limited small br 75 27 small second small Label Astralwerks Last album Lifeforms br 1994 This album ISDN br 1994 1995 Next album Dead Cities album Dead Cities br 1996 Misc Album ratings rev1 Allmusic rev1Score Rating 4 5 ref Allmusic class album id r215951 ref rev2 Almost Cool rev2Score 8.5 10 ref name autogenerated1 http www.almostcool.org mr 424 Future Sound Of London ISDN almost cool music review Bot generated title ref rev3 NME rev3Score Rating 8 10 ref NME Magazine 12 10 94, p.44 8 out of 10 ...has more bite and more energy than LIFEFORMS , possibly as a result of being performed live...the ideal soundtrack for going surfing around the rings of Saturn or hang gliding through the methane clouds of Jupiter... ref rev4 Fluffhouse rev4Score Rating 7 10 ref http www.fluffhouse.org.uk musicreviews album.php?albumid 376 ref ISDN is a music album by experimental electronica artists The Future Sound of London which was released in two different versions in 1994 and 1995. The music on the album is edited together from various live broadcasts that the band had broadcast to radio stations all over the world using ISDN , which at the time was a relatively new technology. The album Stylistically, the record ... 1984 film Repo Man in Eyes Pop Skin Explodes Everybody Dead is a line spoken by the character J. Frank ... by Yage for EBV Recorded live at Earthbeat Studios, London 1995, during various ISDN transmissions ... Reflist External links discogs release id 6007 name ISDN The Future Sound of London DEFAULTSORT Isdn Category The Future Sound of London albums Category 1994 live albums ru ISDN th ...   more details



  1. ISDN Show

    Infobox Album See Wikipedia WikiProject Albums Artist The Future Sound of London Name ISDN Show Type Live album Cover FSOL ISDN show 97 cover.jpg Released 1997 flagicon United Kingdom Genre Electronica br Ambient music Ambient br House music House Length 56 27 Label Virgin Records br ISDNSHOW1 Producer FSOL Last album Dead Cities album Dead Cities 1996 This album ISDN Show br 1997 Next album The Isness 2002 Reviews ISDN Show is a 1997 promotional release of a live ISDN show by The Future Sound of London that was netcast around that time, and as such it is a rare item and one of the last, technical, releases by FSOL until 2002. The track list given on the CD itself is incorrect Yage is split into two tracks, making the further titles inaccurate. This corrects itself later on as the second Womb track is not given its own index, making the track list from Glass onwards correct. Track listing Yage 2 26 My Kingdom 4 08 Womb 5 39 Psycho Crab 3 59 Her Face Forms In Summertime 4 17 G Electro 4 28 Tingler 96 4 39 Womb 4 37 Glass 4 26 Herd Killing 4 39 Max Original 4 21 Carlos 6 26 Everyone In The World 3 11 Sitting Around 1 51 Crew The disc itself contains no credit list, but it is to be presumed that all tracks written and produced by The Future Sound of London and engineered by Yage , except Psycho Crab written and produced by Leon Mar as Oil References Empty section date July 2010 External links http www.subirimagenes.com fotos fsoisdnlive 2187642.html ISDN Live Show Cd & cover image discogs release id 10048 name ISDN Show The Future Sound of London DEFAULTSORT Isdn Show Category The Future Sound of London albums Category 1997 live albums Category Virgin Records live albums ...   more details



  1. ISDN-oriented Modular Interface

    IOM is a system architecture and its bus for communication between various VLSI IC s for the lower layers ref. OSI model of ISDN . It was developed by Siemens today Infineon , current revision is IOM 2. Its purpose is to enable modularity. Second sources are AMD , Alcatel , Plessey . IOM 2 is a 4 wire serial, full duplex link. 2 operation modes are available line card mode and terminal mode which differ only in number and purpose of the channels. Signals are DCL data clock, 16  kHz N, where N number of channels FSC frame sync, 8  kHz DU data upstream DD data downstream Cite book year 1991 title ICs for Communications, IOM 2 Internal Reference Guide publisher Siemens AG Cite book year 1994 title ICs for Communications, ISDN Subscriber Access Controller for Terminals, ISAC STE, PSB2186 User s Manual publisher Siemens AG Cite book last Georg first Otfried year 2000 title Telekommunikationstechnik publisher Springer ISBN 3540668454, 9783540668459 in German, p.  278ff give an overview and some application examples Category Integrated Services Digital Network Telecomm stub ...   more details



  1. Multiple Subscriber Number

    Unreferenced stub auto yes date December 2009 Orphan date December 2009 Multiple Subscriber Number a telephone number associated with an ETS 300 Basic rate interface BRI line. Providers of ETS 300 often give you three MSNs with a BRI, although additional MSNs can be purchased. An ISDN terminal will ring provide an alerting signal only when calls are made to the MSN or MSNs entered in that terminal. If a terminal has no MSNs entered it will ring whenever there is a call to any of the MSNs on that BRI. Category Integrated Services Digital Network Telecomm stub nl Multiple Subscriber Number pl MSN ...   more details



  1. Subscriber Loop Carrier

    Unsourced date January 2012 A subscriber loop carrier or subscriber line carrier SLC provides telephone exchange like telephone interface functionality. An SLC remote terminal is typically located in an area with a high density of telephone subscribers, such as a residential neighborhood, that is remote from the telephone company s central office. Two or four Digital Signal 1 T1 circuits depending on the configuration connect the SLC remote terminal to the central office terminal COT , in the case of a universal subscriber loop carrier USLC . An integrated subscriber loop carrier ISLC has its T span s terminating directly in time division switching equipment in the telephone exchange . One system serves up to 96 customers. This configuration is more efficient than the alternative of having separate copper pairs between each service termination point the subscriber s location and the central telephone exchange. See also Pair gain Distributed switching Digital loop carrier Telephone line Remote concentrator Category Telecommunications equipment Category Local loop ...   more details



  1. ISDN User Part

    SS7stack The ISDN User Part or ISUP is part of the Signaling System 7 Signaling System 7 which is used to set up telephone call s in PSTN Public Switched Telephone Networks . It is specified by the ITU T as part of the Q.76x series, ref http www.itu.int rec T REC Q en ITU T Q Series Recommendations . ref When a telephone call is set up from one subscriber to another, many telephone exchange s will be involved, possibly across international boundaries. To allow a call to be set up correctly, where ISUP is supported, a Telephone exchange switch will signal call related information like called party called or calling party number to the next Telephone exchange switch in the network using ISUP messages. The telephone exchange s are connected via E carrier E1 or T carrier T1 trunks which transport the speech from the calls. These trunks are divided into 64 kbit s timeslots, and one timeslot can carry exactly one call. Each timeslot between two switches is uniquely identified by a Circuit identification code Circuit Identification Code CIC that is included in the ISUP messages. The exchange uses this information along with the received signalling information especially the Called Party Number to determine which inbound CICs and outbound CICs should be connected together to provide an end to end speech path. In addition to call related information, ISUP is also used to exchange status ... switch when the subscriber is reached and the phone starts ringing. Answer Message ANM &mdash Sent when the subscriber picks up the phone. Normally charging starts at this moment. Release ISUP Release REL &mdash Sent to clear the call when a subscriber goes on hook. This is also sent without a preceding ... which exchange the ISUP messages. The subscriber interfaces are not covered here and are only listed for a better understanding. A subscriber telco switch A telco switch B B subscriber Off hook Dial ... Signaling System 7 Category Integrated Services Digital Network Category Application layer protocols ...   more details



  1. Common ISDN Application Programming Interface

    File LOGO CAPI RGB.jpg 220px right The Common ISDN Application Programming Interface short CAPI is an Integrated Services Digital Network ISDN conform standardized software Interface computer science interface . With the help of the CAPI Interface computer software intended for the use with ISDN can be provided, without knowledge of the deployed, proprietary ISDN card . CAPI was designed from 1989 by Germany German manufacturers AVM GmbH AVM , Systec, Stollmann . Since 1991 CAPI is being developed further by CAPI Association e.V. Implementation s exist for different operating system s like Linux and Microsoft Windows . Through the European Telecommunications Standards Institute ETSI CAPI 2.0 was introduced as standard ETS 300 324 Profile B . Primarily CAPI was designed for data transfer over ISDN . The specification has been extended multiple times, thereby it became important to the area of voice and fax communication. Because pure data transfer over IP based networks is dominant in modern times, CAPI is being used primarily in the scope of voice applications voice mail, Interactive voice response IVR , call center, voice conference systems etc. , for fax servers and combined systems Unified Messaging UMS . The CAPI Interface in its current release CAPI 2.0 supports a variety of signaling protocol s D channel protocols , e.g. Digital Subscriber System No. 1 DSS1 and FTZ 1 TR 6 . The interface operates in the OSI model between layer 3 and 4 but only controls layers 1 to 3. Besides popular signaling protocols for Integrated Services Digital Network ISDN implementations of CAPI for Asynchronous transfer mode ATM , GSM and Voip VoIP H.323 and Session Initiation Protocol SIP exist, thus CAPI applications can be used directly on cutting edge communications infrastructure. Special ... for Linux not maintained since 2006 Category Integrated Services Digital Network de Common ISDN Application Programming Interface it C.A.P.I. pl Common ISDN Application Programming Interface ...   more details



  1. Cisco LAN2LAN Personal Office for ISDN

    Wikify date April 2012 Cisco LAN2LAN Personal Office for ISDN This product was an entry level ISDN remote access solution intended to be used by remote teleworkers, schools and small remote sites. Dial on demand was heavily featured, as the product was from an era where time online and data transfers were cost prohibitive. The solution consisted of an ISDN adapter card with one ISDN Basic Rate Interface BRI port that plugged into a PC chassis. These access cards were developed in conjunction with Newport Systems Inc and ITK GmbH, Germany, and sold under the Cisco banner. The LAN2LAN Personal Office for ISDN tied a PC to a central site. They featured dial on demand support and was able to connect to remote Cisco ISDN routers. The cards were only able to transmit data over a single ISDN B channel i.e. 64 kbit s . An ODI driver was included that allowed TCP IP and IPX connections. An automated install setup program was included. Supported technology Point to Point Protocol PPP Challenge Handshake Authentication Protocol CHAP Calling Line Identification CLI LAN2LAN Enterprise A enterprise endpoint was also available. This was essentially a software router that could be run from a communications server. ref cite web title InfoWorld May 1995 url http books.google.com.au books?id xDoEAAAAMBAJ&pg PA54&lpg PA54&dq cisco LAN2LAN Personal Office for ISDN &source bl&ots koiEi0n 9H&sig Ydc ZFuWaz0V6zQIoax22SXiGhw&hl en&sa X&ei Dz18T4j9IYq9iAfQmuGnCQ&ved 0CDYQ6AEwAw v onepage&q cisco 20 LAN2LAN 20Personal 20Office 20for 20ISDN &f false work I ref Pricing circa 1995 US 2,610 Launch Pricing Original list pricing circa 1995 ref cite book title Infoworld url http books.google.com.au books?id pzoEAAAAMBAJ&pg PA41&lpg PA41&dq cisco 1003 launch price&source bl&ots nL3LaMMLZs&sig JM4beXfVsmoTYV7FOLLmggPwfPQ&hl en&sa X&ei dDp8T9SoGOrPmAWOzLX9Cw&ved 0CFUQ6AEwAw ref Cisco LAN2LAN Personal Office for ISDN US 675 References reflist Category Cisco products ...   more details



  1. Subscriber trunk dialling

    refimprove date December 2011 Subscriber trunk dialling STD , also known as subscriber toll dialling is a term for a telephone system allowing subscribers to dial trunking trunk calls without telephone operator operator assistance. Terminology As well as the UK, the term subscriber trunk dialling is used in other countries such as the Republic of Ireland , Australia and India . The corresponding term in the North American Numbering Plan USA and Canada is direct distance dialing direct distance dialling . The term was extended when, on 8 March 1963, subscribers in London were able to directly dial Paris using International Direct Dialling international subscriber trunk dialling . Explanation Image MumbaiIndiaiPhoneCellphoneShots2011 3.jpg thumb Typical signboards of STD booths kiosks from where STD calls can be made in India The introduction in the UK of subscriber dialling of long distance calls removed the distinction that had existed between Trunk vs Toll Trunk and Toll calls. This term however, is still widely prevalent in India to describe any national call made other than one s local unit. A subscriber is someone who subscribes to, i.e. rents, a telephone line and a trunk call is one made over a Trunking trunk line , i.e. a telephone line connecting two exchanges a long distance apart. Now that all calls may be dialled direct, the term has fallen into disuse. History In the UK, STD started on 5 December 1958 when the Elizabeth II of the United Kingdom Queen , who was in Bristol , dialled a phone call to Edinburgh &ndash the furthest distance a call could be directly dialled. ref name 1958 cite web url http www.btplc.com Thegroup BTsHistory 1912to1968 1958.htm title Events in Telecommunications History 1958, BT s history , btplc.com date 2008 06 18 accessdate 2008 08 12 ref The STD system was completed in 1979, ref name 1979 cite web url http www.btplc.com Thegroup ... news article from the BBC on the introduction of Subscriber Trunk Dialing. http news.bbc.co.uk ...   more details



  1. Digital

    other uses A digital system ref Tocci, R. 2006. Digital Systems Principles and Applications 10th Edition .... By contrast, non digital or Analog signal analog systems use a Continuum mathematics continuous range of values to represent information. Although digital representations are discrete, the information ..., such as sounds, images, and other measurements of continuous systems. The word digital ... real world information is converted to Binary numeral system binary numeric form as in digital audio and digital photography . Digital noise When data is transmitted, or indeed handled at all, a certain .... While digital transmissions are also degraded, slight variations do not matter since they are ignored ... the signal and so provide a kind of distortion. In a digital signal, similar variances will not matter ... be taken to avoid noise and distortion when connecting digital and analog systems, but more when using analog systems. Symbol to digital conversion Since symbols for example, alphanumeric Character computing ... of continuous or analog information to digital. Instead of sampling signal processing sampling and quantization signal processing quantization as in analog to digital conversion , such techniques ... is done by activating each x line in sequence and detecting which y lines then have a signal ... needs to be converted but is not in the standard. Properties of digital information All digital information ... Since digital information is conveyed by the sequence in which symbols are ordered, all digital .... Machine communications typically use special synchronization sequences. Language All digital communications ... and receiver of the digital communication must both possess, in advance, in order for the communication ... or error between the intended and actual communication. Disturbances in a digital communication ... an entirely error free digital communication. Further, techniques such as check codes may be used ... in digital communications can take the form of substitution errors in which a symbol is replaced ...   more details




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