http://70.231.62.181/index.php?action=history&feed=atom&title=Digital_Access_Signalling_System_1Digital Access Signalling System 1 - Revision history2026-04-22T15:33:02ZRevision history for this page on the wikiMediaWiki 1.45.1http://70.231.62.181/index.php?title=Digital_Access_Signalling_System_1&diff=5536&oldid=previmported>Waacstats: Stub sort2025-10-17T22:14:03Z<p>Stub sort</p>
<p><b>New page</b></p><div>{{short description|Proprietary protocol providing ISDN services}}<br />
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'''Digital Access Signalling System 1''' ('''DASS1''') is a [[proprietary protocol]] defined by [[British Telecom]] to provide [[Integrated Services Digital Network|ISDN]] services in the [[United Kingdom]].<ref>{{cite web |title=Introduction To Line Telecommunications |url=https://www.tlc-direct.co.uk/Technical/Telecoms/History/TH022.htm |publisher=TLC |access-date=3 February 2024}}</ref> It is now obsolete, having been replaced by [[DASS2]]. This too will become obsolete over the coming years as [[Q.931]], a European standard, becomes widely adopted in the [[European Union|EU]].<br />
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==References==<br />
{{Reflist}}<br />
{{BT Group}}<br />
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[[Category:BT Group]]<br />
[[Category:History of telecommunications in the United Kingdom]]<br />
[[Category:Integrated Services Digital Network]]<br />
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