31results about How to "Implement voice calls" patented technology

The invention discloses a modem used for realizing that a software telephone uses a communication line of an entity IP (Internal Protocol) telephone to establish talking. The modem comprises a communication module, a judgment module, a recording module and a modification module, wherein the communication module is used for receiving a talking request packet from the software telephone, and also transmitting the modified talking request packet to a server and receiving a talking response packet from the server; the judgment module is used for judging whether the talking request packet containsa special mark or not and whether the entity IP telephone is in an idle state or not; the recording module is used for recording a source IP address of the talking request packet when the entity IP telephone is in the idle state; the modification module is used for modifying the source IP address of the talking request packet to be an IP address of the entity IP telephone. The modification modulemodifies a target IP address of the talking response packet to be a source IP address recorded in the recording module, and the communication module resends the modified talking response packet to the software telephone so as to establish the talking.

The invention discloses a mine safety production monitoring system. By the system, staff on the ground can monitor the safety production condition of running of an underground coal face and a belt conveyor in real time. The system comprises a ground main system, data exchange equipment, an underground work face control system and an underground belt conveyor protection system; the underground work face control system and the underground belt conveyor protection system are connected with the ground main system through the data exchange equipment; and the underground work face control system and the underground belt conveyor protection system control, protect, and monitor all equipment such as the underground coal face, a diving work face, an underground belt conveyor and the like, and can perform information acquisition on all the equipment such as the underground coal face, the diving work face, the underground belt conveyor and the like. By the system, the control, protection, line communication, fault detection, display, alarm and other functions of all equipment such as the underground coal face, the diving work face, the belt conveyor and the like are realized, ground and underground information sharing, and voice communication are realized, and ground equipment can perform remote monitoring on underground equipment; and the system is the most advanced communication control system in the field of coal mine at present.

The present invention provides a method for implementing a frequency monitoring system. The system includes: a frequency monitoring server, a frequency monitoring client, a communication server, a frequency monitoring controller, and a frequency monitoring receiver. The method for realizing the frequency monitoring system is: A frequency monitoring controller is added to the monitoring receiver, and the frequency monitoring controller analyzes and processes the spectrum information and reports it to the frequency monitoring server; the frequency monitoring controller controls the frequency monitoring receiver to adjust the operating parameters according to the instructions of the frequency monitoring client; The monitoring controller realizes the matching between the control protocol of different devices and the standard control protocol. The implementation method can realize that multiple users share one receiver to realize frequency monitoring; realize remote control of transmitting station and receiver on the same platform; solve the problem of illegal use and positioning of frequency points; and can record effective receiving information to the maximum extent ;Using a smaller bandwidth ensures reliable transmission of information.

PURPOSE: A method for registering a lost mobile communication terminal and a user connection method are provided to report a loss of terminal to a mobile communication provider if the terminal is lost, and to automatically connect to a representative telephone number if a finder uses the terminal, by previously registering the representative telephone number. CONSTITUTION: A user accesses a mobile communication terminal provider by using a wired / wireless telephone to report a loss of terminal(S10). The user requests the provider to receive a terminal loss report(S11). If an information input request is received from the provider, the user inputs information on the lost terminal with user information(S12). The provider compares the inputted information with prestored information(S13). If the compared information is identical, the provider receives the loss report while the user inputs a representative telephone number if a predetermined signal is received from the lost terminal and completes a loss report registration(S14).

Embodiments of the invention relate to the technical field of mobile communications, and disclose a voice communication realization method and a server. The method comprises the steps of receiving a voice call request sent from a calling virtual SIM card through a data network, wherein the voice call request comprises identity information of a called virtual SIM card; determining whether the calling virtual SIM card activates a voice over internet protocol (VOIP) service; and if the calling virtual SIM card activates the VOIP service, sending the voice call request to the called virtual SIM card through the VOIP network according to the identity information of the called virtual SIM card. According to the method, voice communication is realized through the data network in which the virtual SIM card registers.

The invention discloses a voice call method and system: the method includes the following contents: a registration request step, registering each smart home device on a voice plug-in; a heartbeat connection step, the smart home device sending a message to the voice plug-in A heartbeat request to establish a connection; a voice call establishment step, the smart home device establishes a voice call with an external terminal according to different call modes. Using the voice module provided by the optical modem itself, by adding an additional voice plug-in to the optical modem, the traditional protocol is packaged into a special protocol for other network terminals to use, so as to avoid exposing the core system of the telecom operator to the public environment middle. The voice module on the optical modem itself provides call capabilities for fixed phones, and the call quality is guaranteed by the operator. Therefore, after adding the voice plug-in, the voice call quality is more reliable than that of traditional softphones.

The invention discloses a transmission device based on short wave communication. The transmission device comprises a wired fax transceiver and a short wave fax transceiver. The wired fax transceiver comprises a PSTN user interface circuit and an Ethernet interface, the PSTN user interface circuit is connected with a modem, a DTMF signal receiver and an analog signal processing, the Ethernet interface, the modem and the DTMF signal receiver are connected with a first ARM single chip microcomputer, the short wave fax transceiver comprises a short wave radio, the short wave radio is connected with a short wave modem and an analog signal access circuit, the short wave modem is connected with a second ARM single chip microcomputer, the analog signal access circuit is connected with an analog signal processing circuit, the short wave fax transceiver further comprises an Ethernet concentrator connected with the Ethernet interface, and the short wave radio is also connected with a short wave antenna. Under the condition of not changing the ordinary fax machine, faxes are received and sent and computer data communication and voice calls are achieved by means of the short wave communicationmode. The invention further discloses a signal transmission method using the device.

The invention discloses a device for receiving a call from a different network number based on a single-card dual-standby secondary number, which includes a mobile phone terminal A and a mobile phone terminal B, and also includes a different-network switching center in the same network as the mobile phone terminal A. Among them, the different network switching center is connected to the gateway office responsible for the interconnection of other networks or operators. The gateway office is also connected to the provincial HLR and the local MSC. The local MSC is also connected to the MGW and the single-card dual-standby voice center in turn. The mobile terminal A and the mobile terminal B of the mobile phone are respectively connected to the inter-network switching center and the local MSC through the network. The invention can realize that a secondary number of a mobile terminal used as a living number can receive calls from numbers in different networks.