ENUM - The bridge between the switched telephony network and the Internet
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ENUM (E.164 Number to URI Mapping) translates telephone numbers into Internet addresses. You can dial a telephone number and reach a SIP, H.323 or any other Internet Telephony user. This all happens in the background; you do need to do anything special while calling someone.
A server with ENUM support will lookup a dialled telephone number in the ENUM tree of the DNS to see if there's alternate ways to set up the call instead of just calling out on the PSTN telephone line. ENUM may contain a reference to a SIP URI, a telephone number to dial, a web page or an e-mail address.
ENUM is already supported by SIP Proxies like SER, Kamailio, OpenSIPS or SNOM 4S, VoIP gateways like Asterisk, Swyx, and SIP phones (SNOM).
Enum uses DNS NAPTR resource records.
ENUM RFC 6116 is a protocol developed by the IETF that uses the Internet DNS system to translate E.164 (i.e. ordinary) telephone numbers into IP addressing schemes (like SIP, H323 or Email). To register new Enumservices (or update existing ones) with IANA, RFC 6117 contains all the information you need.
News
- New ENUM Standards Published (14. March 2011): RFC 6116, RFC 6117 and RFC 6118 update various older RFCs on ENUM.
- nrenum.net is now a productive service (Spring 2011). Nrenum.net, a service of the National Research and Education Networks (NRENs), can be used in the countries where the Golden Tree (e164.arpa) is not (yet) available and it is maintained by Terena. ...