Editing Automatic number identification (section)

==DNIS==
[[Dialed Number Identification Service]] (DNIS) is a related service feature available to [[private branch exchange]] subscribers.<ref>{{cite book
   |title=Encyclopedia of Information Technology |date=2007
   |publisher=Atlantic Publishers and Distributors LTD|isbn=978-81-269-0752-6|page=142}}</ref><ref>[https://books.google.com/books?id=pyguvxndiogC&pg=PA315&lpg=PA315&dq=at%26t+dnis&source=bl&ots=dRVcDwKkRz&sig=Wk3_lj9i68Ur63tUpk_Np28uM94&hl=en&ei=rSAKS8_jNdKWtge20ryzCg&sa=X&oi=book_result&ct=result&resnum=3&ved=0CA8Q6AEwAjge#v=onepage&q=at%26t%20dnis&f=false>Waite, Andrew]. A Practical Guide to Call Center Technology. p315. {{Webarchive|url=https://web.archive.org/web/20140628160252/http://books.google.com/books?id=pyguvxndiogC&pg=PA315&lpg=PA315&dq=at%26t+dnis&source=bl&ots=dRVcDwKkRz&sig=Wk3_lj9i68Ur63tUpk_Np28uM94&hl=en&ei=rSAKS8_jNdKWtge20ryzCg&sa=X&oi=book_result&ct=result&resnum=3&ved=0CA8Q6AEwAjge#v=onepage&q=at%26t%20dnis&f=false>Waite, |date=2014-06-28 }}</ref> It transmits information about the destination number, which a service provider can use to have several toll-free numbers directed to the same [[call center]] and provide unique service. DNIS can also be used to identify other call routing information. For example, toll-free service can be configured to send a specific DNIS number that is assigned to callers from geographic regions based on city, area code, state, or country.