Patent ID: 7480305
Filing Date: 2009-01-20
Classification: H04L

Abstract:
1. A method for managing a registration state of an endpoint node in a network address port translation environment, the method comprising: at a network address translation device, receiving a registration message from a first endpoint node located within a local network, the registration message being sent from the first endpoint node to a gatekeeper node, wherein the registration message includes a local source address of the first endpoint node, a first local source port of the first endpoint node, and local call signaling information; at the network address translation device, translating the local source address and/or the first local source port of the first endpoint node into a first global address and/or a first global port, respectively; at the network address translation device, creating a first binding that associates the local source address with the global source address and/or associates the first local source port with the first global port; at the network address translation device, translating the local call signaling information into global call signaling information; at the network address translation device, creating a second binding between the local call signaling information and the global call signaling information such that the second binding associates different local and global information than the first binding, wherein creating the first and second bindings is based on the registration message that was received at the network translation device; and if an unregistration message is received from the first endpoint node, dismantling the first binding and the second binding at the network address translation device.