An LTE cellular mobile network access system and a corresponding communication method are provided. The system includes a SIM card interface device, a mobile terminal, and a NRS accessing to a domestic cellular mobile network. The SIM card interface device is configured to hold a SIM card and forward authentication information of the SIM card to the NRS via the mobile terminal. The mobile terminal is in communication with the NRS via the Internet and is configured to register on the NRS and transmit signaling data and voice data to the NRS. The NRS is configured to establish a standard S1 connection with the domestic cellular mobile network and transmit the signaling data and the voice data to the domestic cellular mobile network.

The present invention maintains calls during transfers between different types of subsystems, even when there is a bearer path interruption at the user element due to the original connection from the transferring-out subsystem being dropped before the new connection in the transferring-in subsystem is established. The call signaling leg toward the remote endpoint of the remote party is held, while the call signaling leg toward the user element is moved from the transferring-out subsystem to the transferring-in subsystem and a new bearer path is established via the transferring-in subsystem. During transfers with a bearer path interruption, a portion of the bearer path leading to the remote endpoint may be connected to a media resource function, which will provide an announcement to the remote party. Once the user element is accessible in the transferring-in subsystem, the bearer path is further transferred to the user element via the transferring-in subsystem.

One embodiment of the present invention provides a collect call method and system thereof, more particularly, in order to charge the called party with a uniform toll for collect call, which is determined by only the type and location of called party terminal. In one embodiment, the collect call method, system and a counsel service providing method use a free VoIP network for part of the voice call link and a charge PSTN network for the rest of the voice call link. In one embodiment, if the first link corresponding to the collect call request is established, the collect call switch calls the called party terminal to establish the second link, and billing on the second link is initiated.

A base phone and additional phone implementation method, and an Internet Protocol (IP) terminal. The implementation method includes acquiring, by the IP terminal, a group address, group-sending, by the IP terminal, a base phone query message according to the group address, and determining whether a base phone feedback message is received, and when the IP terminal receives the base phone feedback message fed back by a base phone, marking the IP terminal as an additional phone, and otherwise marking the IP terminal as a base phone, and registering with a server, and according to the implementation method the base phone and the additional phone are set up using IP terminals, which avoids disadvantages of a lack of security protection and proneness to theft when an analog phone is connected in a manner of physical parallel connection of copper cables, and therefore improves security significantly.

A method for automatic transmission of status information from a first communications terminal set up for speech communication to a second communications terminal set up for text communication is provided. The speech communication between communications terminals is processed over a speech communications server and the text communication between communications terminals over a text communications server. The speech communications server and the text communications server exchange messages over at least one converter device. The status information will be transmitted from the first communications terminal over the speech communications server, the converter device, and the text communications server to the second communications terminal.

A gateway device includes a call handling equipment (CHE) listener interface, an Internet Protocol (IP) interface, a provisioning engine, and a message parsing engine. The CPE listener interface forms a communication channel with a CHE and receives call event data from the CHE. The IP interface communicates with a cloud-based processing system. The provisioning engine receives, from the cloud-based processing system via the IP interface, instructions for parsing data from a data output format of the CHE into a consistent data format of the cloud-based processing system. The message parsing engine parses the call event data received from the CHE via the CHE listener interface, and formats the call event data according to the consistent data format. The gateway device transmits the formatted call event data to the cloud-based processing system via the IP interface.

Picture and speech communication between plural terminals connected to different networks, such as a circuit-switched network and IP network. A converting apparatus 400 for control information or media information for picture/speech communications is provided across first and second terminals 301, 302 connected to respective different types of networks. Converting apparatus 400 includes control information converter 420, transcoder 450 and ability information converter 460. In case the ability information extracted from the decoding information, received from the first terminal 301, is not coincident to the ability information extracted from the call control information received from the second terminal 302, it is further checked whether or not there is picture format size coincidence. If the picture format size coincidence persists in one direction, processing is carried out for converting part of the decoding information or the control information, without causing the operations of the transcoder. In case there is no picture format size coincidence, the transcoder 450 is booted to convert the bitstream.

A system and method for providing an audio conference between heterogeneous networks are provided. The system for providing an audio conference according to one embodiment of the present disclosure includes an audio conference server configured to relay an audio conference between a plurality of terminals; and a web conference server configured to receive a request of a host terminal for connection to the audio conference and create a first bridge session for audio data transmission/reception between the host terminal and the audio conference server and a second bridge session for maintaining a host connection of the host terminal.

A method for automatic transmission of status information from a first communications terminal set up for speech communication to a second communications terminal set up for text communication is provided. The speech communication between communications terminals is processed over a speech communications server and the text communication between communications terminals over a text communications server. The speech communications server and the text communications server exchange messages over at least one converter device. The status information will be transmitted from the first communications terminal over the speech communications server, the converter device, and the text communications server to the second communications terminal.

Various embodiments of systems, devices, and methods are described for wireless communication. In one example a first wireless signal is received in a first radio frequency spectrum using a first antenna exterior to a building. The first wireless signal is associated with a first wireless protocol. The first wireless signal is converted into a first intermediate signal associated with a coaxial protocol. The first intermediate signal is transmitted to an interior of the building using a coaxial cable. The first intermediate signal is converted into a second signal associated with a second wireless protocol. The second signal is then transmitted in a second radio frequency spectrum using a second antenna interior to the building. The second signal is transmitted using the second wireless protocol.