Abstract: Provided are a device and method for maintaining a communication session during a network transition. In one example, the method includes monitoring, by a client, a connection with a first network to determine whether a signal strength of the connection falls below a threshold value. The client establishes a connection with a second network if the signal strength of the connection with the first network falls below the threshold value. Establishing the connection with the second network includes obtaining an address and port assignment corresponding to the client from the second network. The client uses the obtained address and port assignment to maintain a communication session during the changeover from the first network to the second network.

Abstract: An improved system and method are disclosed for peer-to-peer communications. In one example, the method provides for concurrent sessions to be maintained by multiple endpoints.

Abstract: An improved system and method are disclosed for peer-to-peer communications. In one example, the method enables an endpoint to traverse a NAT device using a stateless reflector.

Abstract: An improved system and method are disclosed for sharing a document between two communication devices that do not have an application that can display the document. In one example, the document is sent by the communication device that is sharing the document to a document server for processing into pages of one or more different document types, and both communication devices retrieve the stored pages as needed for display. The sharing communication device updates the other communication device when a new page is to be retrieved from the document server.

Abstract: A system and method for endpoint handoff in a hybrid peer-to-peer networking environment are provided. In one example, the method includes logging into the peer-to-peer network by a first endpoint. The first endpoint directly notifies a second endpoint that the second endpoint is to transfer an active communication session existing between the second endpoint and a third endpoint from the second endpoint to the first endpoint. The first endpoint receives session parameters associated with the active communication session directly from the second endpoint and directly notifies the third endpoint that the first endpoint is online. The first endpoint then re-establishes the active communication session with the third endpoint using the session parameters.

Abstract: An improved system and method are disclosed for peer-to-peer communications. In one example, the method enables an endpoint to engage in a call with another endpoint using a third party instant message system to carry instant messages containing signaling information and a route that is external to the third party instant message system for both signaling and media information.