An embodiment of the system for publishing events of a telephony application to a client includes a call router that generates events from the telephony application and an event router that manages the publication of events generated by the call router and that manages the subscription to events by clients. The system can be used with a telephony application that interfaces with a telephony device and an application server.

A telecommunications addressing system/method allowing selection of a telephone instrument device (TID) using arbitrary identifiers is disclosed. The system/method allows a source TID (STD) to select a target TID (TTD) by the use of a Target Telephone Identifier (TTI) data string rather than a traditional numeric telephone identification (NTI). This TTI is then indexed within a TTI/NTI mapping server (TMS) that functions as a hierarchical repository of TTI/NTI mappings. STD/TTD communication is established by first performing a lookup of the STD-selected TTI within the TMS to identify the NTI of the TTD. Once the NTI of the STD has been identified by the TMS, communication between the STD and TTD is established using the NTI via the normal public switched telephone network (PSTN). TMS TTI lookup may be performed via STD TID web application and/or via PSTN infrastructure interface.

A method for telephony includes receiving at an Internet telephony service provider a subscriber request to place a call to a telephone number. A cache associated with the internet telephony service provider is queried to check if the cache holds a record for the telephone number. If the cache holds the record, the record is obtained. If the cache does not hold the record, a request is sent to a database server that maintains a database of records associating endpoint user terminal telephone numbers of subscribers with respective packet network addresses of the endpoint user terminal. The call is placed to the endpoint user terminal telephone number via a public switched telephone network whilst the request is sent to the database server to retrieve the packet network address of the endpoint user terminal to which calls to the telephone number should be placed.

A method includes receiving, at a network component of a first carrier network from a source device, a telephone number of a destination device configured to communicate via a second carrier network. The method further includes in response to a query message sent to a telephone number mapping device of an internetwork packet exchange network, receiving a name server record at the network component, the name server record indicating a domain name associated with a second telephone number mapping device of the second carrier network. The method also includes in response to the network component sending the domain name to a domain name server of the internetwork packet exchange network, receiving an Internet protocol address of the second telephone number mapping device. The method includes sending, from the network component to the second telephone number device, a second query message based on the Internet protocol address.

A method includes establishing a circuit switched call with an automated answering system at a destination, the destination having a communication server associated therewith, transmitting a request to switch to Internet Protocol (IP) communication to the automated answering system, receiving an IP request acknowledgement message from the communication server responsive to transmitting the request to switch to IP communication, and establishing an IP communication session with the communication server responsive to receiving the IP request acknowledgement. Systems and computer program products are also disclosed.

There is proposed a method and corresponding apparatuses allowing a change from a packet switched communication domain to a circuit switched communication domain. When a user equipment as a connection terminating point receives a connection initialization message with a media flow, such as audio, which cannot be delivered by the packet switched access, it sends a specific response rejecting the connection via the packet switched access to an application server for service centralization and continuity. In the application server, it is checked whether several conditions are met in order to determine whether the communication connection comprising the media flow is allowed to be changed to the circuit switched domain. If yes, the communication connection is changed from the packet switched communication domain to the circuit switched communication domain.

There are provided systems and methods of using the systems to make telecommunications. The systems and methods include application software on a user phone, and a telecommunications apparatus, or computer communication network, configured to make communications for the user. The system permits the user to carry out steps including opening the software app on a mobile phone, as a source telephone; making a communication with a target telephone of another through the app; and receiving a response to the communication, where the response includes a GPS location of the target telephone. The GPS location is displayed on the telephone user interface of the source telephone. In the systems, the numeric telephone identification of the source telephone device, and/or the numeric telephone identification of the target telephone device may be masked.

Methods and systems for routing multimedia traffic are described. A method may include receiving a communication originating from a user, transposing an alias transport network over one or more existing networks to route the communication, and routing the communication based on mapping rules.

Apparatus and methods concerning routing of calls in an IPBX are disclosed. As an example, one apparatus includes an IPBX server configured to route VoIP calls for a plurality of end-users having respective VoIP-enabled devices communicatively coupled to the IPBX via a network. A user-activity detection circuit is communicatively coupled to the IPBX server. The user-activity detection circuit is configured to receive activity data indicating activity of end-users in a virtual office environment and receive event messages indicating statuses of pending calls in the IPBX server. The user-activity detection circuit determines user-activity statuses of the end-users based on received activity data and event messages. A computing server is communicatively coupled to the user-activity detection circuit and is configured to provide a set of services for one or more of the plurality of users as a function of the determined user-activity statuses of the end-user.

Concepts and technologies pertaining to enabling internet protocol carrier peering to foreign network domains are provided. A method includes identifying, by a computer system executing within an originating carrier network, a plurality of numbering plan area identifiers corresponding to a receiving carrier network. The method further includes accessing, by the computer system executing within the originating carrier network based on the plurality of numbering plan area identifiers, a plurality of numbering plan area zone file records stored on a private enabled telephone number mapping server. The method also includes creating, by the computer system executing within the originating carrier network, a single instance of a name authority pointer record placeholder within each of the plurality of numbering plan area zone file records stored on the private enabled telephone number mapping server.