IP PBX

Abstract: A method is provided that includes receiving a request from a communication device to establish a communication session with a mobile station, the mobile station being operable to roam between a private and a public network The mobile station is signaled via a cellular data network that a call is being initiated for the mobile station Signaling information may be exchanged with a voice gateway such that one or more voice circuits are established A signaling pathway may be established between an Internet protocol private branch exchange (IP PBX) and the mobile station via the cellular data network The establishment of the signaling pathway is substantially concurrent with the establishment of one or more of the voice circuits One or more features associated with a private network are delivered to the mobile station during the communication session as an end user moves between the public and private networks

Abstract: An IP PBX system that serves enterprise telephones via a landline IP network connection is be expanded to serve cellular wireless communication devices (WCD) via a cellular wireless carrier's radio access network (RAN). Calls to and from the cellular WCD are connected through the cellular carrier's RAN and the IP PBX system, so that the IP PBX system can control and manage the calls just as the IP PBX would control and manage calls involving other extensions on the IP PBX. A cellular WCD thereby becomes an IP PBX client station, i.e., an extension on the IP PBX system. As such, the cellular WCD can seamlessly benefit from many of the same IP PBX features that other more conventional IP PBX client stations (e.g., desk phones) enjoy.

Abstract: A method of managing Voice over Internet Protocol (VoIP) calls with an Internet Protocol Private Branch Exchange (IP PBX) is provided, including: receiving at an IP PBX device an incoming call directed to a target telephone number, said IP PBX device storing a contact list parameter including one or more rule fields, each rule field including a telephone number identifier and an associated target extension identifier; searching the contact list parameter to identify the telephone number identifier corresponding to the target telephone number; and routing the incoming call to one or more target extensions corresponding to the target extension identifier associated with the identified telephone number identifier

Abstract: A comprehensive solution for providing secure mobile communication is provided. The system includes techniques for authentication and control of communication end-points; chain of trust to ensure devices are certified as authentic; contact list management; peer-to-peer encrypted voice, email, and texting communication; and a technique for bypassing an IP PBX to ensure high levels of security. The system is able to support use of commodity mobile communication devices (e.g., smart phones, laptops) over public carrier networks.