Gatekeeper transport address determination in an internet telephony system using a domain alias
US6373857B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 13, 1998 |
| Grant date | Apr 16, 2002 |
| Priority date | — |
| Expiry date | Nov 13, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L65/1106
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An Internet Protocol (IP) telephony system cross-references transport addresses of Gatekeepers using a domain name of the IP telephony system. The IP telephony system is serviced by at least one Gatekeeper and the transport address for each Gatekeeper is stored on a Domain Name Server (DNS). An A record or other suitable record may be employed within the DNS to index the transport addresses of the Gatekeepers to the IP telephony system domain name. A calling endpoint first queries the DNS for the transport address of a Gatekeeper servicing the IP telephony system. The DNS address retrieves at least one transport address for the Gatekeeper(s) and returns the transport address(es) to the calling endpoint. When querying the DNS, the calling endpoint may use an identifier such as [email protected] where the user name of the called endpoint is “subscribername” and the domain name of the IP telephony system is ABC.domain.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.