Method and system for establishing paths between end points...

Details Method and system for establishing paths between end points... Method and system for establishing paths between end points...

2007-12-25

2007-12-25

To, Doris H. (Department: 2616)

Multiplex communications

Pathfinding or routing

Switching a message which includes an address header

Reexamination Certificate

active

10447908

ABSTRACT:
The invention provides a method of determining the degree of network address translation (NAT) traversing required to dynamically establish a bearer path within or out of a Service Provider hosted Enterprise VoIP VPN. Each media end point in the Enterprise IP VPN has associated with it a chain of the identities of a hierarchy of NAT functions behind which it resides with respect to an SP public IP network over which the Enterprise VoIP is hosted. By comparing the respective NAT function identity chains for an originating end point and a destination end point, a call agent can determine what, if any, NAT functions need to be traversed in the bearer path between the end points.

REFERENCES:
patent: 6360265 (2002-03-01), Falck et al.
patent: 6687245 (2004-02-01), Fangman et al.
patent: 6781982 (2004-08-01), Borella et al.
patent: 7139828 (2006-11-01), Alkhatib et al.
patent: 2003/0154306 (2003-08-01), Perry

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