Editing Digital Signal 3 (section)

{{Short description|Telephony call multiplexing standard}}
{{Refimprove|date=June 2010}}
'''Digital Signal 3''' ('''DS3''' or '''T3 line''') is a digital signal level 3 [[T-carrier]]. The data rate for this type of signal is 44.736&nbsp;Mbit/s (45&nbsp;Mb). It can transport 28 [[Digital Signal 1|DS1]] level signals within its payload. It can transport 672 [[Digital Signal 0|DS0]] level channels within its payload.<ref>{{cite web|last=McMahan |first=Emmet |title=Guide to T3 / DS3 Broadband Basics |url=http://www.business.com/guides/t3--ds3-broadband-basics-26403/ |archive-url=https://archive.today/20120728210458/http://www.business.com/guides/t3--ds3-broadband-basics-26403/ |url-status=dead |archive-date=28 July 2012 |publisher=Business.com |accessdate=9 June 2011 }}</ref>

Such circuits are the usual kind between [[Telephone company|telephony carrier]]s, both wired and [[wireless]], and typically by [[OC1]]{{citation needed|date=June 2011}} optical connections.