Abstract: A system for providing network access translation device traversal to facilitate communications is provided. The system includes a network access translation (NAT) device, a first Session Initiation Protocol (SIP) client located on the interior of the NAT device, a second SIP client located on the exterior of the NAT device, and a proxy server configured to maintain registration information relating to the first SIP client and the NAT device. The proxy server is further configured to allow the second SIP client to initiate contact with the first SIP client and establish a communication session using the registration information. The communication session is established by traversing the NAT device.

Abstract: A method for managing UMA communications within a local area network and a network controller are disclosed. The method includes establishing a first connection between a first UMA device and a LAN-based UMA network controller (LAN-UNC) and establishing a second connection between a second UMA device and the LAN-UNC. The first and second connections are carried over the local area network. The first and second UMA devices are connected to the same local area network. The method provides establishing a third connection between the LAN-UNC and a UMA network controller (UNC). The UNC is connected to an external network and the third connection extends over the external network. The method includes transporting packets received using the first and second connections to the UNC using the third connection. Packets received using the third connection are transported to the first UMA device using the first connection and to the second UMA device using the second connection.

Abstract: A method for managing UMA communications within a local area network and a network controller are disclosed. The method includes establishing a first connection to a first UMA device over the LAN and establishing a second connection to a UMA network controller (UNC) over an external network. The first UMA device is connected to the local area network and the UNC is connected to the external network. Packets received from the first UMA device using the first connection are sent to the UNC using the second connection. Similarly, packets received from the UNC using the second connection are sent to the first UMA device using the first connection. The first connection may include a first IPsec tunnel and the second connection may include a second IPsec tunnel. The external network may include the internet.

Abstract: A method for managing Unlicensed Mobile Access (UMA) communications within a local area network and a LAN-based UMA network controller are disclosed. The method includes monitoring packets received from a first UMA device connected to the local area network and detecting whether they represent a call between the first UMA device and a second UMA device. The method also includes determining whether the second UMA device is connected to the local area network. If the packets represent a call between the first and second UMA devices and the second UMA device is connected to the local area network, packets representing audio data are maintained within the local area network.