Patent ID: 7522931
Filing Date: 2009-04-21
Classification: H04L,H04M

Abstract:
1. A method comprising: extending a mobile operator's push-to-talk (PTT) system to enable registered users on the PTT system to establish PTT sessions with unregistered end-user equipment, where such unregistered end-user equipment is not registered for PTT service with any mobile operator's PTT system but can be located on a public data network by querying a directory service database accessible on a public data network, the database containing a PTT address for the unregistered end-user equipment, the method including: a wireless phone, having PTT functionality and registered with the mobile operator's PTT system, sending a request for a PTT session to the system's PTT server, the request including a unique identifier of the unregistered end-user equipment wherein the equipment comprises a destination network computer accessible on a public data network and having PTT functionality; the PTT server receiving the request and sending a query to the directory service database for the PTT address of the unregistered end-user equipment; the directory service database receiving and resolving the query, based on the unique identifier, to the PTT address of the unregistered end-user equipment; and the PTT server receiving the PTT address and sending a request to initiate a PTT session with the destination network computer.