A control method that can control an MCU and a video conference terminal using a user terminal, and a video conference system for the control method are proposed. The method of controlling a video conference of the present disclosure includes: a pairing request step in which the user terminal connects to the MCU in a wired or wireless type and then requests pairing with a target video conference terminal to the MCU; a pairing step in which the user terminal forms a control channel between the user terminal and the MCU in accordance with approval of the pairing request by the MCU; and a control step in which the user terminal requests one of control items allowed by the MCU to the MCU after the pairing step.

A method of operating a captioned telephone comprising the steps of dialing a telephone number to a relay gateway, connecting to the gateway over a communication network, performing a test to assess communication network quality, based on the test results, setting up the captioned telephone to operate in at least one of a first mode and a second mode wherein each of the first and second modes is one of (i) a PSTN mode in which data is communicated between the captioned telephone and the relay gateway via analog transmission and (ii) an IP mode in which data is communicated between the captioned telephone and the relay gateway via the Internet.

Techniques are described for performing multi-factor authentication of a user during a service session, based at least partly on a code conveyed using an audio file. A code is generated that corresponds to the user and/or their user device. A playback device that is registered to the user can be used to output a playback of an audio file that encodes the code. The playback of the audio file is conveyed through the service session by the user device and received by a backend server, which analyzes the playback of the audio file to extract the code. The user can be authenticated based at least partly on verifying the code that is extracted from the playback of the audio file, by comparing the extracted code to the code that was generated and sent to the playback device.

Methods and apparatus implementing a telephony terminal for connecting a telephone to a data network. In one implementation, a telephony system includes: a phone connection for connecting to a telephone; a network connection for connecting to a network; and a controller connected to said phone connection and to said network connection; wherein said controller provides a phone service for processing information for said phone connection, said controller provides a network service for processing information for said network connection, and said controller provides a network voice service for converting information to and from a network voice format.

A control unit of a telephone device is configured to perform a first processing of: estimating a line echo amount based on a volume of a DTMF signal generated by a DTMF signal generation unit and a volume of the DTMF signal input from a line; calculating a howling noise threshold value based on the maximum value of the acoustic echo generated at a handset that is measured in advance and set values of a sidetone volume, a transmission volume, and a reception volume; and calculating a difference between the line echo amount and the howling noise threshold value as an adjustment requisite amount and lowering the set value of the sidetone volume by the adjustment requisite amount when the line echo amount is larger than the howling noise threshold value.

Systems, methods, and computer-readable media for providing smart notifications during voice call transitions from hold status to active status are described. An example method can include establishing a call between an endpoint and a remote device; after a determination that the call was placed on hold by the remote device, monitoring, by the endpoint, the call for an indication of a call resume transition, the indication of the call resume transition including at least one of a particular keyword transmitted by the remote device, an active speaker at the remote device, and a dual-tone multi-frequency signaling (DTMF) input from the remote device; detecting, by the endpoint, the indication of the call resume transition; and in response to detecting the indication of the call resume transition, generating, by the endpoint, a notification indicating that the hold has ended and the call has resumed.

Methods and apparatus implementing a telephony terminal for connecting a telephone to a data network. In one implementation, a telephony system includes: a phone connection for connecting to a telephone; a network connection for connecting to a network; and a controller connected to said phone connection and to said network connection; wherein said controller provides a phone service for processing information for said phone connection, said controller provides a network service for processing information for said network connection, and said controller provides a network voice service for converting information to and from a network voice format.

Systems, methods, and computer-readable media for call classification and for training a model for call classification, an example method comprising: receiving DTMF information from a plurality of calls; determining, for each of the calls, a feature vector including statistics based on DTMF information such as DTMF residual signal comprising channel noise and additive noise; training a model for classification; comparing a new call feature vector to the model; predicting a device type and geographic location based on the comparison of the new call feature vector to the model; classifying the call as spoofed or genuine; and authenticating a call or altering an IVR call flow.

Systems, methods, and computer-readable media for providing smart notifications during voice call transitions from hold status to active status are described. An example method can include establishing a call between an endpoint and a remote device; after a determination that the call was placed on hold by the remote device, monitoring, by the endpoint, the call for an indication of a call resume transition, the indication of the call resume transition including at least one of a particular keyword transmitted by the remote device, an active speaker at the remote device, and a dual-tone multi-frequency signaling (DTMF) input from the remote device; detecting, by the endpoint, the indication of the call resume transition; and in response to detecting the indication of the call resume transition, generating, by the endpoint, a notification indicating that the hold has ended and the call has resumed.

A system and method for receiving and executing emoji based commands in messaging applications. The system and method may include processes such as identifying emojis in a message, determining one or more action based on the emoji, and completing the determined actions.