Lectures notes for 2010 - KTH

ENUM
IETF’s E.164 Number Mapping standard uses Domain Name Server (DNS) to
map standard International Telecommunication Union (ITU-T) international
public telecommunications numbering plan (E.164) telephone numbers to a list of
Universal Resource Locators (URL). SIP then uses those URL’s to initiate
sessions.
For example, ENUM DNS converts a telephone number in E.164 format, e.g.
+46812345, and returns e.g., a Universal Resource Identifier (URI)
SIP:olle.svenson@telia.se
Then a SIP client can make a connection to the SIP gateway telia.se passing the
local part olle.svenson.
ENUM can return a wide variety of URI types.
Maguire ENUM 9: 66 of 71
maguire@kth.se 2010.03.21 Internetworking/Internetteknik