Digital Subscriber Signalling System No. 1 (DSS1) is a digital signalling protocol (D channel protocol) used for the ISDN. It is defined by ITU-T I.411 (ETS 300 102[1]). It supports Bearer Capability, Low Level Compatibility and High Level Compatibility, ANI, DNIS and redirected number signaling in both directions. A standard developed by ETSI for Europe is known as Euro-ISDN or E-DSS1 or simply EDSS1 (European DSS1).
DSS1/EDSS1 protocol, in contrast, for example, to the protocol QSIG, was designed for use as access to public ISDN and asymmetric in the sense that it suggests a link with the network side at one end (digital public telephone exchange) and the user (private branch exchange (PBX)) - at the other.
Since the market for ISDN equipment was open, ETSI provided guidance to suppliers of ISDN equipment by means of the minimum requirements for inter-connectivity to ISDN networks. These documents, called NET3 for BRI and NET5 for PRI lines, described a set of protocol tests terminals should comply to. Later, testing institutes, like KEMA in the Netherlands, implemented and performed the protocol tests and provided the appropriate certificates.
In 1989, 26 network operators from 20 European countries decided to develop EDSS1 as a pan-European standard to replace earlier national protocols (such as FTZ 1 TR 6 (Germany) or VN3 (France)). EDSS1 has been one of the keys to the success of the ISDN within European countries (as compared to, for example, the U.S.).
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.
Referencesedit
^Integrated Services Digital Network (ISDN); User-network interface layer 3 Specifications for basic call control
April 18, 2024
digital, subscriber, system, this, article, needs, additional, citations, verification, please, help, improve, this, article, adding, citations, reliable, sources, unsourced, material, challenged, removed, find, sources, news, newspapers, books, scholar, jstor. This article needs additional citations for verification Please help improve this article by adding citations to reliable sources Unsourced material may be challenged and removed Find sources Digital Subscriber System No 1 news newspapers books scholar JSTOR June 2014 Learn how and when to remove this template message Digital Subscriber Signalling System No 1 DSS1 is a digital signalling protocol D channel protocol used for the ISDN It is defined by ITU T I 411 ETS 300 102 1 It supports Bearer Capability Low Level Compatibility and High Level Compatibility ANI DNIS and redirected number signaling in both directions A standard developed by ETSI for Europe is known as Euro ISDN or E DSS1 or simply EDSS1 European DSS1 DSS1 EDSS1 protocol in contrast for example to the protocol QSIG was designed for use as access to public ISDN and asymmetric in the sense that it suggests a link with the network side at one end digital public telephone exchange and the user private branch exchange PBX at the other Since the market for ISDN equipment was open ETSI provided guidance to suppliers of ISDN equipment by means of the minimum requirements for inter connectivity to ISDN networks These documents called NET3 for BRI and NET5 for PRI lines described a set of protocol tests terminals should comply to Later testing institutes like KEMA in the Netherlands implemented and performed the protocol tests and provided the appropriate certificates In 1989 26 network operators from 20 European countries decided to develop EDSS1 as a pan European standard to replace earlier national protocols such as FTZ 1 TR 6 Germany or VN3 France EDSS1 has been one of the keys to the success of the ISDN within European countries as compared to for example the U S Non European countries using DSS1 include Australia Brazil Iran India Israel New Zealand Pakistan Peru Singapore South Africa Sri Lanka Taiwan Palestine Mexico 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 References edit Integrated Services Digital Network ISDN User network interface layer 3 Specifications for basic call control Retrieved from https en wikipedia org w index php title Digital Subscriber System No 1 amp oldid 1170818279, wikipedia, wiki, book, books, library,
