A method includes receiving a request to initiate an emergency call, directing, the mobile device to initiate the emergency call using a cellular network, receiving a network not available indication that the emergency call cannot be completed using the cellular network, selecting location information of the mobile device and requesting the emergency call be initiated by a VoIP client on the mobile device using the location information obtained from the selecting step.

Provided is a method and system for automatically connecting a call of a Voice over Internet Protocol (VoIP) service. A method of automatically connecting the VoIP call in an electronic device implemented by a computer may include a setting a specific counterpart among counterparts capable of making the VoIP call over a network as an automatic connection target; and automatically connecting a call with the specific counterpart immediately in response to executing a program including a function of providing the VoIP call without performing a calling operation and an acceptance operation for a call between a user of the electronic device and the specific counterpart.

A configurable, multi-function IP-based communication product has a touch screen display and common hardware set form factor that can be configured for use in any of a plurality of operational modes and can be ruggedized for use in harsh environments. The common hardware set form factor enables the IP-based communication product to be optimized for commercial use, that is, easily adapted for different applications and environments using a minimal number of housing configurations or features (e.g., tactile buttons or dials). The operational modes can include, but are not limited to, VoIP telephone, video streaming for video calls, intercom, alarm activation for a central public address/general alarm (PA/GA) system, a serverless page-party (SP2) system, voice product with FLASH, product with conference function, on-board communications device, and so on.

The disclosure relates to methods and devices for controlling speech quality, in particular by controlling end-to-end latency and by improving speech quality in case of mobility scenarios. A method 200 for controlling end-to-end latency between receiving and processing audio frames includes: receiving 201 a data packet comprising at least one coded audio frame; storing 202 the received data packet in a packet buffer; retrieving 203 the received data packet from the packet buffer and decoding the at least one coded audio frame into audio samples; and processing 204 the audio samples, wherein a scheduling of retrieving 203 the received data packet from the packet buffer and decoding the at least one coded audio frame is based on a target criterion with respect to audio quality of the audio samples and latency between receiving the data packet and processing the audio samples, and wherein the scheduling is dynamically and smoothly shifted in time in order to avoid audio distortions.

The present invention discloses a remote control method, apparatus, terminal device, and computer readable storage medium, wherein, the method comprises: receiving a screen image of a controlled terminal device from the controlled terminal device; generating an operation instruction according to the screen image; sending the operation instruction to the controlled terminal device to control the controlled terminal device. The present invention solves the problems such as complicated operation and poor real-time effect when a control terminal device remotely controls a controlled terminal device in prior art, and the present invention realizes real-time control over a controlled terminal device by a control terminal device.

A method, a device, and a non-transitory storage medium are provided to receive from an end device, a session establishment message pertaining to a voice service that restricts the end device to place a voice call to and receive a voice call from a designated call center; replace a uniform resource identifier of the designated call center included in the session establishment message, with an enterprise identifier included in subscription data pertaining to the end device; select, based on the enterprise identifier, another network device to transmit the session establishment message; and transmit the session establishment message to another device based on the selection.

Systems and methods for dynamically causing a terminal to change audio codec modes during a session with another terminal. In one aspect, the terminal is forced use to switch to a more resilient audio codec mode when the quality of wireless channel being used by the terminal deteriorates below a threshold.

A cost-effective system and method of sending and receiving high quality phone calls over a low-cost network (e.g., a local area network, a WiFi network, etc.) with a wireless device, where such phone calls would typically have been delivered over a cellular network to the wireless device is provided herein. The system enables the wireless device to retain a phone number assigned by its home cellular network to send and receive calls, while still sending and receiving such calls over the low-cost network. The system also enables wireless devices to be authenticated with the home network of the wireless device for purposes other than sending and receiving high-quality phone calls.

A security implant device and a method of operation of the security implant, for securing Voice over IP (VoIP) phone, the implant device disables audio input and output components of the VoIP phone in order to prevent audio eavesdropping.

Disclosed is a method for operating an application providing a group call service using mobile voice over internet protocol (mVoIP). According to one embodiment, a request signal for a group call is received, and regardless of participation in the corresponding the group call, meta information for the group chat room corresponding to the group call can be received from a server. The meta information can comprise at least the group call connection status for each member of the group chat room.