ENUM


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ENUM

(Electronic NUMbering) A protocol from the IETF for converting a telephone number to an IP address and vice versa so that it can be resolved by the Internet's DNS system like traditional website domains. Primarily designed to strengthen voice over IP (VoIP) service, ENUM is expected to provide a one-stop directory for contacting people and services and to integrate the public telephone network (PSTN) with the Internet. See DNS, VoIP and VPIM.

The E164 ARPA Domain
ENUM transforms a phone, fax or pager number into a dotted Internet address that is stored in the DNS system. For example, the fully qualified telephone number 1-215-555-1234 would turn into 4.3.2.1.5.5.5.5.1.2.1.e164.arpa. The digits are reversed because DNS reads right to left (the top-level domain such as .com in a URL is read first).

Typing in a telephone number would resolve into a URL where the target could be a traditional phone, a VoIP phone or a Web service. ENUM records can hold attributes about a device such as whether it can receive a text message or is Internet capable. See E.164, RDF and XDI.
References in periodicals archive ?
"The successful testing of ENUM on Telekom Austria's next generation environment demonstrates yet again that the infrastructure is ready for commercial customer pilots.
But there is still disagreement over how the ENUM registries contracting with this LLC would be required to operate.
Proponents say ENUM will simplify communications because one point of contact could be routed to a telephone, e-mail inbox, or fax machine, depending on the application.
In keeping with the need to allow for voluntary implementation of the scheme and recognizing that ENUM services are primarily national issues, rapid progress at the international level is necessary to create a stable environment in which investment can be made in the worldwide deployment of ENUM.
"ENUM implementation and peering solutions are key areas of focus for sentitO and our work with XConnect is further testament to that commitment."
MERA Systems, a supplier of VoIP softswitches and session controllers, has joined efforts with telecomms company Stealth Communications' Voice Peering Fabric to deliver a routing solution with integrated ENUM lookup capabilities.
Pulver.com last week applied to ICANN for the right to offer .tel domain names to IP communications service providers using ENUM, a standard for mapping telephone numbers into the internet domains name system.
Interim procedures for ENUM, a technology that builds a bridge between the public switched telephone network and the Internet, have been approved.