DigitalAccessSignallingSystem DASS may refer to the following ISDN protocols created by British Telecom DASS1 DigitalAccessSignallingSystem 1 DASS1 DASS2 DigitalAccessSignallingSystem 2 DASS2 disambiguation ... more details
DigitalAccess Carrier System DACS is the name used by British Telecom BT Group plc in the United Kingdom for a 0 2 Pair gain system. Image RUPOLE.JPG 300px thumb Two Telspec DACS remote units mounted ... to a digital trunk. One Telspec EU rack takes up to 80 analogue lines, 10 per ALC Analogue Line Card , and produces up to 40 digital trunks, 5 per DLC card. It consists of 1 SMAC System Maintenance .... ISDN and DACS use different D channel signalling. DACS has up to 140V DC on the digital telephone .... Now obsolete and rarely encountered. DACS1 first generation digitalsystem that did not support Caller ... to the audio customer. See also Subscriber Loop Carrier Digitalaccess and cross connect ... lines. The more modern ISDN technology based digital systems that perform this task are known ... digital information for both lines over the same copper pair between the exchange and the pole ... pairs. Overview The DACS system consists of three main parts The exchange unit EU , which connects multiple pairs of analogue lines to their corresponding single digital lines. One Telspec EU rack connects as many as 80 analogue lines over 40 digital copper pairs. The copper pair between the Exchange and the Remote Unit, carrying the digital signal between the exchange unit and the remote unit. The remote unit RU , which connects two analogue customer lines to one digital copper pair. The RUs .... Advantages Because it uses a digital signal along most of the distance between the subscriber and the exchange ... system has built in monitoring from the exchange. An alert is generated if the connection is lost ... can only be achieved if there is a single digital to analogue conversion in the route from the ISP to the end user. Since DACS involves an additional conversion to digital, and then back to analogue ... s modems are unable to successfully negotiate even this speed over a DACS line. Digital Subscriber ... 48V to 5V converter to supply the digital circuitry in the rack. Fault mimics to present to the exchange ... more details
The Digital Private Network SignallingSystem DPNSS is a network protocol used on digital trunk lines for connecting two PABX . It supports a defined set of inter networking facilities. DPNSS was originally defined by British Telecom . The specification for the protocol is defined in BTNR188. The specification currently comes under the Network Interoperability Consultative Committee. History DPNSS was developed in the early 1980s by BT, or its forerunner, Post Office Telecommunications in recognition that the emerging Digital Private Circuit Primary Rate product Megastream had to address the market for both data and voice, the latter being significantly greater because of the market for PBXs. It may seem odd now Says who date April 2011 that BT would invest in the development of a signaling protocol for PBXs in which it had a minority interest and in competition with its PSTN services. Under the liberalization rules of the day 1979 , BT was barred from manufacturing, selling or supplying PBXs of more than 200 extensions. Digital PCM based PBXs were just starting to come into the marketplace ... PBX types available in the UK. See also DASS1 DigitalAccess Signaling System 1 DASS1 obsolete DASS2 DigitalAccess Signaling System 2 DASS2 obsolete QSIG the International Standards Organisation ... Telephony signals ro Digital Private Network SignallingSystem .... It is widely used in the rest of Europe . DSS1 Digital Subscriber System No. 1 DSS1 The ISDN PBX ... APNSS was developed using analogue trunks Sometimes compressed and a modem to support D channel signalling ... as a statistical multiplexing system. When traffic deltas are low, a single call establishment message will have access to the full 64Kbs allowing for overheads . DPNSS is a layer 3 protocol functioning ... network carries packetised voice N x 64 Kbs speech and a separate IP signalling channel to carry the notional 64 Kbs of DPNSS signalling. A more sophisticated solution uses intelligence on the edge ... more details
Signalling channel associated signaling CAS . This is the case for earlier analogue trunks, Multi frequency MF and R2 signalling R2 digital trunks, and DigitalAccessSignallingSystem DSS1 DASS ...SS7 stack SignallingSystem No. 7 SS7 is a set of telephony Signaling telecommunications signaling protocols ... service SMS , and a variety of other mass market services. It is usually referenced as SignallingSystem No. 7 or SignallingSystem 7 , or simply abbreviated to SS7 . In North America it is often referred to as CCSS7 , an abbreviation for Common Channel SignallingSystem 7 . In some European countries ... by the ITU T as SS6 SignallingSystem No. 6 SS6 in 1977. ref name Ronayne 1986 145 harv Ronayne 1986 p 145 . ref SignallingSystem No. 7 was defined as an international standard by ITU T in its 1980 ... digital protocol stack. OSI layers 1 to 3 are provided by the Message Transfer Part MTP and the Signalling ... Dryburgh first Lee coauthors Jeff Hewitt title SignallingSystem No. 7 SS7 C7 Protocol, Architecture ... Category Signaling System 7 Category Telephony bn cs SignallingSystem 7 de Signalling ... with SS7 MTP2 M2UA and M2PA MTP3 M3UA Signalling Connection Control Part SCCP SUA but use ... 28 bit signal unit that was both limited in function and not amenable to digital systems. ref name Ronayne 1986 145 SS7 has substantially replaced SS6 , SignallingSystem No. 5 SS5 , Multi frequency R1 and R2 signalling R2 , with the exception that Multi frequency R1 and R2 signalling R2 ... Architecture for Signaling Transport ref Functionality The term Signalling telecommunications signaling ... Services Digital Network ISDN User Part ISDN User Part ISUP adapted for public switched ... when the European networks upgraded to the Integrated Services Digital Network ISDN . North ... to the exchange of control information, Non Facility Associated Signalling non facility associated signalling ... 2004 p 23 . ref Physical network SS7 separates signalling from the voice circuits. An SS7 network ... more details
The amplitude modulation signallingsystem AMSS or the AM signallingsystem is a digitalsystem for adding low bit rate information to an analog signal analogue amplitude modulation amplitude modulated broadcasting broadcast signal in the same manner as the Radio Data System RDS for frequency modulation frequency modulated FM broadcast signals. This system has been standardized in March 2006 by ETSI TS 102 386 as an extension to the Digital Radio Mondiale DRM system. Broadcasting AMSS data are broadcasted from the following transmitters longwave LW RTL France 234 kHz medium wave MW Deutschlandradio Kultur 990 kHz shortwave SW BBC World Service 15575 kHz Formerly it was also used by medium wave MW Truckradio 531 kHz BBC World Service 648 kHz External links cite web url http www.drm.org uploads media spec 21.pdf format PDF, 100 197 bytes title ETSI TS 102 386 v1.2.1 2006 03 Technical Specification Digital Radio Mondial DRM AM signallingsystem AMSS publisher ETSI month March year 2006 accessdate 2009 12 07 Dead link date October 2010 bot H3llBot http pda.etsi.org pda home.asp?wki id 4S,,jR gRTlnpntrSi4Ru ETSI TS 102 386 V1.2.1 2006 03 directly from ETSI Publications Download Area account or free registration required cite web last1 Murphy first1 Andrew last2 Poole first2 Ranulph url http tech.ebu.ch docs techreview trev 305 murphy.pdf format PDF, 172 312 bytes title The AM SignallingSystem AMSS does your radio know what it s listening to? publisher EBU work EBU technical review month January year 2006 cite web author Lindsay Cornell url http www.broadcastpapers.com whitepapers ABUBBCamss2006.pdf title The AM SignallingSystem AMSS format PDF, 183KiB publisher http www.broadcastpapers.com whitepapers The AM SignallingSystem AMSS .cfm?objid 32&pid ... Category Broadcast engineering Radio comm stub ca AMSS da AM SignallingSystem de AMSS fr Amplitude Modulation SignallingSystem ... more details
Refimprove date July 2007 Signalling block systems enable the safe and efficient operation of Rail transport railways , so as to avoid collisions between trains. Block systems are used to control trains between Railway station stations and yards, and not normally within them. Any block system is defined ... end collision, as opposed to double track , where the main danger is rear end collision. A block system ... methods of block signalling used around the world. Block signalling methods Strict timetable ... as a block system, as if one train is delayed, all trains it is scheduled to meet are delayed. This can ... Train Working redirects here One Train Working with train staff see also Token railway signalling If a single ... Train Working without train staff A modern variation of the One Train Working system operates without .... Electric Train Staff ETS These came in two sizes, large and miniature. See Token railway signalling . Ordinary Train Staff and Ticket OTST or OTS&T See Token railway signalling . Ordinary Train ... OTS . See Token railway signalling . Telegraph Block Used on multiple track sections whereby the passage ... Bulletin , March, 1961 pp43 51 ref Tokenless Block This a system for use on single track railways .... The signalling is designed such that the controlling signals will only allow one train to enter ... 2008 Absolute Block See British absolute block signalling . Comparison of block systems class ... Overlaid block system or time interval working Divisible Train Staff Single track Possession of train staff or portion thereof and clearance of section signal, where provided Overlaid block system ... that previous train has vacated the section British absolute block signalling Absolute Block Manual ... traffic control Single or multiple track Lineside signals Continuous train detection Cab signalling ... Management System ERTMS Level 1 Single or multiple track Lineside signals or cab signals Continuous ... signalling de Streckenblock eo Kantono fervojo fr Block syst me it Sezione di blocco ja nl ... more details
The Digital Audio Access Protocol DAAP is the proprietary protocol introduced by Apple Computer Apple in its iTunes software to share media across a local network. DAAP addresses the same problems for Apple as the Universal Plug and Play UPnP AV standards UPnP AV standards address for members of the Digital Living Network Alliance DLNA . Description The DAAP protocol was originally introduced in iTunes version 4.0. ref name dappdoc http tapjam.net daap Unofficial DAAP protocol documentation by Daniel Garcia, retrieved December 2, 2006 ref Initially, Apple did not officially release a protocol description, but it has been reverse engineered to a sufficient degree that reimplementations of the protocol for non iTunes platforms have been possible. Recently When date March 2011 , however, Apple has begun to license the protocol specification for commercial implementations. ref http www.opendaap.org Open DAAP forum , retrieved December 2, 2006 ref A DAAP server is a specialized HTTP server, which performs two functions. It sends a list of songs and it streams requested songs to clients. There are also provisions to notify the client of changes to the server. Requests are sent to the server ... released. The other, Digital Photo Access Protocol DPAP , is used by iPhoto for sharing images. They both rely on an underlying protocol, Digital Media Access Protocol DMAP . Early versions of iTunes ... OS X Active FreeNAS and http www.freenas.org Home Linux BSD Active See also List of software using Digital Audio Access Protocol Digital Audio Control Protocol Remote Audio Output Protocol Notes and references ... de Digital Audio Access Protocol es Digital Audio Access Protocol fr Digital Audio Access Protocol nl Digital Audio Access Protocol ja Digital Audio Access Protocol pl DAAP pt DAAP ru DAAP sv Digital Audio Access Protocol ... Android operating system Android Active http sourceforge.net projects fireflyclient FireflyClient Independent ... more details
Direct Internet AccessSystem is a technology used to access internet through DSL developed jointly by IITM IIT Madras and Banyan Networks . External links http whitepapers.zdnet.co.uk 0,39025945,60023935p 39000412q,00.htm ZDNet.co.uk Whitepaper Category Digital subscriber line Internet stub ... more details
Unreferenced stub auto yes date December 2009 Orphan date December 2009 Digital Subscriber SignallingSystem No. 2 DSS2 , as the successor to DSS1 , is also a digitalsignalling 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
Downloadable Conditional AccessSystem or DCAS is a proposal advanced by CableLabs for secure software download of a specific Conditional Access client computer program which controls digital rights management DRM into an OpenCable Application Platform OCAP compliant host consumer media device. The National Cable & Telecommunications Association NCTA proposes that DCAS be used as a substitute for physical CableCARD s, a standard also created by CableLabs for which products began appearing in August 2004 as part of industry compliance to the FCC mandate FCC mandate , which in turn is pursuant to the Telecommunications Act of 1996 . DCAS is a controversial proposal for a variety of reasons it currently does not exist, has no set deadlines for support on all cable systems, the specification even in draft form is not currently public, may not satisfy FCC requirements that security modules be separable, and requires an operating system OCAP that a majority of consumer electronics CE manufacturers do not wish to implement. Image DCAS system diagram.jpg thumb 400px DCAS System Diagram DCAS, as currently envisioned, removes the need for physical set top box es or CableCARD s currently required to protect encryption encrypted digital content. It is proposed that instead of a card with removable circuitry, a custom ASIC chip be soldered onto the circuitboard of any digital cable ready device ... system would be required. OCAP programs then would be used as the sole method of interacting with DCAS ... devices such as digital television s, digital video recorder DVR s, and set top boxes still required ... nationwide by Multiple system operator MSO s by July 2008. blockquote It is asserted by proponents ... to the current Subscriber Identity Module SIM chip in a Global System for Mobile Communications GSM ... to legally view digital cable without having to rent hardware from the cable company. See also Interactive ... American DTV Category Cable television technology Category Digital television Category Digital ... more details
Unreferenced stub auto yes date December 2009 Orphan date February 2009 Image Craft Terminal.jpg right 200px The Craft Access System was a system developed by an AT&T subsidiary BellSouth Telecommunications Advanced Systems Division in 1984 that allowed telephone installers and repair personnel to access their work order system e.g., LMOS by means of various pocket PC like devices Craft Access Terminals which connected to the landline telephone system. The developer, Muchiri Motilewa, designed and coded the proof of concept prototype on a Radio Shack TRS 80 Model 100 computer in BASIC and a DEC VAX 11 780 Unix machine in C Programming Language C and C shell programming language Shell . The system went live as the Dispatcher Installer Networking System, DINS, with 10 installers in Birmingham, AL and 10 installers in Atlanta, GA in August of that year and was later ported to the hand held system shown here. The system allowed far fewer dispatchers to give trouble tickets and install assignments to technicians who were also able to send and receive text messages to dispatchers, clock in and clock out, report results and location information, and print paper tickets for the customer to sign on the spot after job completion. Various spoofs still exist today, although they have developed considerably. DEFAULTSORT Craft Access System Category Telephony ... more details
Access Content System AACS is a standardization standard for content distribution and digital rights management , intended to restrict access to and copying of the post DVD generation of optical discs. The specification was publicly released in April 2005 and the standard has been adopted as the access ... Security Main Security of Advanced Access Content System Both title keys and one of the keys used ... Messages AACS Advanced Access Content System accessdate 2007 05 02 archiveurl http web.archive.org ... of attacks against Advanced Access Content System AACS encryption key controversy References reflist ... Category DRM standards Category Optical disc copy protection Category Advanced Access Content System Category Broadcast encryption ca Advanced Access Content System de Advanced Access Content System es Advanced Access Content System fr Advanced Access Content System it Advanced Access Content System ja Advanced Access Content System no Advanced Access Content System pl Advanced Access Content System ru AACS su Advanced Access Content System sv Advanced Access Content System zh AACS ... by other unlicensed software. System overview Encryption AACS uses cryptography to control and restrict the use of digital media. It encrypts content under one or more title keys using the Advanced ... disc . The principal difference between AACS and Content Scramble System CSS , the DRM system ... one version of each section. By embedding a Digital watermarking digital watermark in the different ... web url http www.aacsla.com specifications specs091 AACS Spec Common 0.91.pdf title Advanced Access Content System AACS Introduction and Common Cryptographic Elements accessdate 2007 06 05 date 17 February ... Digital Content Protection HDCP . The decision to set the flag to restrict output down convert ... id 42 accessdate 11 October 2010 ref Managed Copy Managed Copy refers to a system by which consumers can make legal copies of films and other digital content protected by AACS. This requires the device ... more details
refimprove date April 2011 The Systemaccess fee is a non governmental fee surcharge imposed by most Canadian telephone companies on their customers monthly bills ref name cbc http www.cbc.ca marketplace pre 2007 files services cellphones accessfee.html CBC Marketplace Cellphone Secrets Bot generated title ref . Although it is normally charged for wireless services, Rogers Communications and the now defunct Sprint Canada also charged its home phone customers a SystemAccess Fee. It normally amounts to 6.95 month the SystemAccess Fee on Rogers Home Phone Services was 5.95 month, ref name rogers home phone http www.thestar.com Business article 296938 TheStar.com Business Rogers bumps up phone fees Bot generated title ref but has since been merged to the base price . For example, if a wireless plan has been advertised at 20 month, the customer subscribing to it would actually be paying an unadvertised rate of at least 26.95 month, excluding other fees and government taxes. Government Regulatory Recovery Fee Since October 5th, 2009, Rogers Wireless has increased the base cost of all of its monthly plans by 5, and they also replaced their former SystemAccess Fee with a Government Regulatory Recovery Fee GRRF . This fee currently ranges from 1.93 to 3.35, depending on the wireless service selected. In theory, Rogers is simply renaming its SystemAccess Fee. Rogers notes in its fine print that the GRRF is not a tax or charge the government requires Rogers to collect. ref name RogersGRRF http www.rogers.com web Rogers.portal? nfpb true& pageLabel NEW GCT& nfls true&setLanguage en&template grrf THE GOVERNMENT REGULATORY RECOVERY FEE ref Criticism The Canadian Government has required Canadian cellular carriers to make it clear that the SAF is not required for any regulatory or government purpose. As a result the carriers claim that the systemaccess fee covers network operation ... action lawsuit was brought against the major carriers with respect to the SystemAccess Fee. After ... more details
Infobox software name DACS The Distributed Access Control System logo screenshot caption A light weight single sign on and role based access control system for web servers and server based software. collapsible author Developers at Distributed Systems Software developer Distributed Systems Software released latest release version 1.4.27b latest release date release date and age 2012 03 19 latest preview version latest preview date frequently updated Yes programming language C with APIs for some other languages operating system FreeBSD , Linux , Mac OS X size language English status production genre ... Access Control System DACS is a light weight single sign on and role based access control system ... Distributed Access Control System Dacs Category Cross platform free software Category Free security ... Server Apache web servers to provide enhanced access control for web pages, Common Gateway Interface ... engine that can grant or deny access to resources, named by Uniform Resource Locator URLs , based ... files NTLM Windows NT LAN Manager NTLM accounts Lightweight Directory Access Protocol LDAP or Active ... Provider for InfoCards and function as a Relying Party. Authorization DACS performs access control by evaluating access control rules that are specified by an administrator. Expressed as a set of Xml XML documents, the rules are consulted at run time to determine whether access to a given resource should be granted or denied. See also Portal Free software Access control Computer security References R. Morrison, http www.site reference.com articles Website Development Web 2 0 Access Control Part 1.html Web 2.0 Access Control , 2007. J. Falkcrona, http urn.kb.se resolve?urn urn nbn se liu diva 11224 Role based access control and single sign on for Web services , 2008. B. Brachman, http www.ibm.com developerworks webservices library ws soa access.html Rule based access control Improve ... user management and support related utilities Category Computer access control computer security ... more details
A Restricted Access Barrier System RABS is an installation which is used in many industries, such as pharmaceutical, medical, chemical, electrical engineering where clean air is needed. The RABS provides a physical barrier between workers and production areas. ref Cite web url http pharmtech.findpharma.com pharmtech article articleDetail.jsp?id 407885&sk &date & 0A 09 09 09&pageID 2 title The Advantages of Restricted Access Barrier Systems last Rauschnabel first Johannes date 2007 03 02 work PharmaTech.com publisher Advanstar Communications pages 2 accessdate 2009 05 06 ref See also Clean room References Reflist Tech stub Category Filters Category Perimeter security Category Security ... more details
The Corporate Emergency AccessSystem CEAS is a pre event credentialing program, which authenticates critical business employees for access to restricted areas following a disaster or serious emergency using a secure identification card recognized by the police. Municipalities must adopt the CEAS Program for use in their jurisdiction before businesses can enroll in the Program and receive ID cards. The local authorities can implement CEAS following an emergency once immediate threats to life are stabilized. Because identifying and empowering second responders helps make the difference between lingering disruption and the necessary and timely restoration of daily life, many state and local governments are adopting the unique second responder identification protocol known as The Corporate Emergency AccessSystem. CEAS was developed in New York State during the 1990 s by the Business Network of Emergency Resources, a not for profit organization which pioneered this emergency identification card based capability. The CEAS program helps businesses mitigate damage and loss resulting from a disaster or emergency, by allowing businesses rapid access to restricted areas following emergency events. Participating businesses select a pre determined number of employees to receive CEAS access ID cards based on total employee population. These critical employees can quickly get back to work, assess damages and ensure their companies viability, continuity and recovery. By allowing safe and secure emergency access, CEAS gives businesses the opportunity to put a sound emergency management plan in place. Not only does this ensure the rapid recovery of essential operations, but CEAS also provides ... valuables vital records, hardware and critical equipment and core IT systems. Access also enables these designated employees to conduct damage assessments, and much more. The CEAS accesssystem ... Category Access control Category Article Feedback 5 ... more details
Orphan date February 2009 The Customer Access and Retrieval System , commonly known as CARS, is mostly used in the Western United States . The system stores bill and credit information, equipment information, carrier billing information, customer contact notes and payment history. The CARS interface is quite similar to the BOSS Clarification needed date October 2011 interface. Operation User IDs are six characters and normally begin with a B for business. Password s usually referred to as lockwords in the western United States are from four to either characters and must contain at least one Alphabetic alpha and one Number numeric character. Passwords expire after 30 days. The system also asks for a Project Code use M , a Group Code use G and a Position Number. The Position Number consists of a pair of two character fields. The first two characters are the office code and the second two characters identify the individual employee. References http www.phrack.org archives 49 P49 13 Telephone Company Customer Applications Category Electronic commerce business software stub ... more details
refimprove date July 2011 Deleted image removed File EMAS Information Card 3rd Edition January 1978.jpg thumb right EMAS Information Card 3rd Edition January 1978 The Edinburgh Multi Access System EMAS was a mainframe computer operating system developed at the University of Edinburgh , Scotland , during the 1970s. EMAS was developed because none of the manufacturers operating systems nor independent systems such as Multics came close to satisfying the demanding performance requirements of Edinburgh University. Originally running on the ICL System 4 75 mainframe based on the design of the IBM 360 it was later reimplemented ref http www.gtoal.com athome edinburgh docs Experiment again.html ref on the ICL 2900 ICL 2900 series of mainframes as EMAS 2900 or EMAS 2 where it ran in service until the mid 1980s. Near the end of its life, the refactored version was back ported as EMAS 3 to the IBM System 370 XA architecture again, running on Amdahl Corporation Amdahl 470 and NAS VL80 IBM mainframe clones into the early 1990s. It was a powerful and efficient general purpose multi user system which supplied all the computing needs of Edinburgh University and the University of Kent the only other site outside Edinburgh to adopt the operating system . The final EMAS system the Edinburgh VL80 was decommissioned in July 1992. EMAS had several advanced for the time features, including dynamic linking , multi level storage, an efficient scheduling computing scheduler , a separate user space kernel computing kernel director , a user level shell computing shell basic command interpreter , and a memory mapped file architecture. Such features lead EMAS supporters to claim that their system was superior to Unix for the first 20 years of the latter s existence. The Edinburgh Computer History Project is attempting to salvage some of the lessons learned ref http history.dcs.ed.ac.uk archive os emas docs taste ref from the EMAS project and has the complete source code of EMAS online for publi ... more details
Unreferenced date December 2009 Digital Subscriber SignallingSystem No. 1 DSS1 , also known as Euro ISDN or E DSS1 European DSS1 , is a digitalsignalling 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
A digital cross connect system DCS or DXC is a piece of Circuit switching circuit switched network equipment, used in telecommunications networks, that allows lower level Time division multiplexing TDM bit stream s, such as DS0 bit streams, to be rearranged and interconnected among higher level TDM signals, such as Digital Signal 1 DS1 bit streams. DCS units are available that operate on both older T carrier E carrier bit streams, as well as newer Synchronous optical networking SONET SDH bit streams. DCS devices can be used for Traffic grooming grooming telecommunications traffic, switching traffic from one circuit to another in the event of a network failure, supporting automated provisioning, and other applications. Having a DCS in a circuit switched network provides important flexibility that can otherwise only be obtained at higher cost using manual Digital signal cross connect DSX cross connect patch panel s. It is important to realize that while DCS devices switch traffic, they are not Packet switching packet switches &mdash they switch circuits , not packets, and the circuit arrangements they are used to manage tend to persist over very long time spans, typically months or longer, as compared to packet switches, which can route every packet differently, and operate on micro or millisecond time spans. DCS units are also sometimes Genericized trademark colloquially called DACS units, after a proprietary brand name of DCS units created and sold by AT&T s Western Electric Western Electric division , now Alcatel Lucent . Not to be mistaken for DigitalAccess Carrier System , a British pair gain system also using the acronym DACS . Modern digitalaccess and cross connect systems are not limited to the T carrier system , and may accommodate high data rates such as those of SONET . See also Optical cross connect References FS1037C Cisco Technical Glossary Category Network architecture Category Telecommunications equipment Category Digital systems Cross connect system ... more details
Wikify date June 2010 The Federal DigitalSystem FDsys replaces GPOAccess, ref http www.gpo.gov fdsys ref an information storage system to house electronic government documents, from 1994 with a modern information management system. FDsys authenticates, preserves, versions, and provides permanent public access to federal government information. The system automates the collection, management and dissemination of electronic information from all three branches of the federal government. The goal is to have a complete historical record from the founding of our nation to the present of all federal government documents. ref http www.gpo.gov GPO.gov ref FDsys was named by Government Computer News as one of the best government Web sites. ref http gcn.com articles 2009 07 27 gcn great gov web sites 2009.aspx?sc lang en ref Within the first few months of the launch of FDsys, the public could find The American Recovery and Reinvestment Act of 2009 the Stimulus Package and President Barack Obama s first budget for the federal government. The Office of the Federal Register s OFR publication, Daily Compilation of Presidential Documents, was specifically engineered for FDsys. This publication contains information released by The White House Press Office regarding orders, statements and remarks made by President Barack Obama. References references External links http www.gpo.gov fdsys FDsys website Category Government services web portals in the United States Category Public records US gov stub ... more details
The Satellite Digital Imaging System SDIS is a simple system composed of commercial off the shelf Commercial Off the Shelf COTS hardware and custom integration software, which allows the operator to transmit digital photos from an aircraft in flight to a ground station. It is currently used by the United States Civil Air Patrol CAP for domestic search and rescue operations and commercial photography. Components Nikon D100 digital SLR camera. Panasonic Toughbook laptop computer with SDIS software installed. Satellite telephone. The SDIS consists essentially of connecting these three devices to one another. No hardware is physically installed in the aircraft. Operation Prior to takeoff, the operator connects the laptop to the Web Mission Information Reporting System WMIRS and obtains a mission identifier. During flight, photos are downloaded to the laptop computer and e mailed to the customer or CAP base using the satellite phone. Images are also captured to a memory card in the digital camera, and may be edited or uploaded to the WMIRS after landing. The Satellite Digital Imaging System SDIS was demonstrated successfully in the search and recovery efforts following hurricanes Katrina and Rita in 2005. Advantages Disadvantages Advantages Near Real Time Low Cost Multi facet Use Disadvantages Unreliable If high cloud cover is present satellite acquisition is difficult Slow Upload Due to Sat. Feed External links http www.video.cap.gov SDIS page at the Civil Air Patrol website. http www.schluesseldienstduesseldorf.de Schl sseldienst D sseldorf Category Digital photography ... more details
Digital nervous system is a phrase, popularly associated with Bill Gates of Microsoft , used to describe a vision for how the Information technology IT infrastructure of an enterprise could be analogous to the autonomic nervous system of a biological organism. Gates made extensive use of the term in his 1999 book Business the Speed of Thought . ref Gates, Bill 1999 . Business The Speed of Thought , Warner Books, New York. ISBN 0446675962 ref The actual phrase digital nervous system may not have originated with Gates however, as it has been reported that Judith Dayhoff used the term before Gates did. ref http www.theregister.co.uk 1999 04 12 digital nervous system not bill ref Steve Ballmer attempted to explain the digital nervous system by saying the following If you think of the human body, what does our nervous system let us do? It lets us hear, see, take input. It lets us think and analyze ... Digital Nervous System Seminar Bot generated title ref Gates himself offered the following explanation as part of a keynote speech at Microsoft s Second Annual CEO Summit in 1998. The term digital nervous system is kind of an interesting one. The analogy, of course, is to the biological nervous system where you always have the information you need. You always are alert to the most important ... it. ref http www.roughnotes.com rnmagazine 1998 october98 10p34.htm Digital Nervous System 10 98 Bot generated title ref Digital nervous system has also been described as being synonymous with the term ... has a nervous system companies take inputs, they think, they plan, they communicate, they take action. The question is how does the nervous system in your company operate? Is the IT infrastructure really ... The term digital nervous systems was used in 1987 89 at the IBM Guide Share Conference in a presentation ... taxonomy while designing a computer integrated manufacturing system at Rockwell Int l NAAO B1 B division ... 802.pdf Digital Nervous Systems Making Sense of Shared Information Category Business software Category ... more details
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 ... Digital Subscriber Line Access Multiplexer . User traffic is mostly IP based. Traditional 20th ... s Backbone network backbone switch, via an access network AN also called a Network service provider ... traffic is switched to a Broadband Remote Access Server where the end user traffic is then routed ... within a neighborhood serving area interface , sometimes in conjunction with a digital loop carrier ... weaker signals however the solid state electronics required to construct such digital interfaces ... and Asymmetric Digital Subscriber Line 2 Plus ADSL2 technology and maximum data rate. Local conditions ... and a richer set of features and functionality. See also Commonscat DSLAM Asymmetric digital 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 ... news ?ID 173 Portugal Telecom article in Portuguese Category Multiplexing Category Digital 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 line access multiplexer hr DSLAM id DSLAM it DSLAM he DSLAM ml . . . nl DSLAM ja DSLAM no DSLAM pl Digital Subscriber Line Access Multiplexer pt Multiplexador de Acesso a Linha Digital do Assinante ru DSLAM fi DSL keskitin th DSLAM tr DSLAM uk DSLAM zh ... more details
The Digital Emergency Alert System DEAS was a proposed? system managed by the Federal Emergency Management Agency FEMA and designed to alert first responders and civilians in the event of a national emergency. It was based upon and supplemented the Emergency Alert System EAS by sending out text, voice, video, and other digital messages to mobile phones, pagers, radios, and televisions. Although the Emergency Alert System and its predecessor, the Emergency Broadcast System and an even earlier predecessor CONELRAD , have always allowed the transmission of both video and audio, there have been limitations that would be eliminated by the DEAS. For example, the DEAS allowed the ability to broadcast bottomless audio messages i.e. a message with no definite ending and streaming video. It also allowed near instantaneous transmission without the delays that occur as EAS alerts trickle through the system. ref cite news last Sarkar first Dibya title FEMA tests digital alert system Technology will send messages to wireless devices, radio, TV and the Internet url http www.fcw.com article88522 04 11 05 Print newspaper Federal Computer Week date 2005 04 11 archiveurl http web.archive.org web 20080907044243 http www.fcw.com article88522 04 11 05 Print archivedate 2008 09 07 ref History In 2004, Las ... what digital television has to offer in times of emergency. Citation needed date July 2010 As of 2005, the system was in the final stages of its development with an expected activation and roll ... news title US unveils emergency alert system for mobile phones, computers url http www.breitbart.com ... Network PLAN system. It mandates that new cell phones be manufactured with a special chip capable ... news last Wyatt first Edward title Emergency Alert System Expected for Cellphones url http www.nytimes.com ... Network Common Alerting Protocol Commercial Mobile Alert System References references External ... Alert System Category Disaster preparedness Category Stub Class Radio articles ... more details
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