The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 03, 2004
Filed:
Jul. 05, 2000
Philip K. Edholm, Fremont, CA (US);
Nortel Networks Limited, , CA;
Abstract
In an IP communication network, telephone number based services, such as Voice-over-IP (VoIP), Fax-over-IP, and IP Paging, are supported using network address translation. A gatekeeper determines a gateway for a connection between a first telephone number based device in a first network and a second telephone number based device in a second network based upon a telephone number for the second telephone number based device. The gateway is situated between the two networks, and enables communication between the two telephone number based devices by having a first address for the first telephone number based device for use in the first network, allocating a second address or address/port number pair for the first telephone number based device for use in the second network, and performing address translation on communication messages exchanged between the first telephone number based device and the second telephone number based device such that the first address for the first telephone number based device is used in the first network and the second address or address/port number pair for the first telephone number based device is used in the second network.