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:
Dec. 29, 2009
Filed:
Sep. 30, 2003
Dany Sylvain, Gatineau, CA;
Scott Larrigan, Ottawa, CA;
Dany Sylvain, Gatineau, CA;
Scott Larrigan, Ottawa, CA;
Nortel Networks Limited, St. Laurent, Ontario, CA;
Abstract
A VPN gateway for interfacing two or more VPNs to external networks such as the internet or a PSTN having different addressing schemes, has a NAT shared by the VPNs for converting VPN addresses to addresses of the external network. An advantage of this is reduced number of additional network elements, e.g. boxes, and fewer additional addresses. The NAT can be a source and destination NAT, arranged such that entities in the external networks appear to have an address within an address range of the respective VPN. Thus, entities in the external resource can appear as trusted resources inside the VPN. The gateway can incorporate a converter for converting between formats such as VoIP packets and TDM calls.