March 2006
RFC 4355 : IANA Registration for Enumservices email, fax, mms, ems, and sms - [...] - January 2006
"This document registers the Enumservices "email", "fax", "sms", "ems", and "mms" using the URI schemes 'tel:' and 'mailto:' as per the IANA registration process defined in the ENUM specification RFC 3761".
RFC 4415 : IANA Registration for Enumservice Voice - R. Brandner, Siemens AG - L. Conroy, Siemens Roke Manor Research - R. Stastny, Oefeg - February 2006
"This document registers the Enumservice "voice" (which has a defined subtype "tel") [...]. This service indicates that the contact held in the generated Uniform Resource Identifier (URI) can be used to initiate an interactive voice (audio) c
RFC 2806 : URLs for Telephone Calls - A. Vaha-Sipila, Nokia - April 2000
"This document specifies URL (Uniform Resource Locator) schemes "tel", "fax" and "modem" for specifying the location of a terminal in the phone network and the connection types (modes of operation) that can be used to connect to that entity".
September 2005
1
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