ENUM
Click on the red underlined text to get to the source
... 2396(-> 3986std66) [9]), such as pres:user@host.com. ENUM exists primarily to
facilitate the interconnection of systems that rely on telephone
numbers with those that use URIs ...
... ENUM Service Registration ...
... telephones, or presence of non-
telephony communications services advertised by ENUM.
Endpoints ...
... 10]) contains a string composed of two subfields: a 'protocol'
subfield and a 'resolution service' subfield. ENUM in particular
defines an 'E2U' (E.164 ...
... an inquirer. All DNS records must be assumed to be available to all
inquirers at all times. The information provided within an ENUM
record set must therefore be considered open to the public -- which
...
... authentication and authorization before presence information is
returned. In concert with presence protocols, ENUM can actually
provide far greater protection from unwanted callers than does the
...