When an SIP server (24) receives a call signal addressed to a callee side terminal (31), a number conversion history set by an SIP server (22) that has transferred the call signal in a transfer service involved with a number conversion is read from the call signal, and if the number conversion history meets a specific condition, a warning signal is transmitted to the callee side terminal (31) before the call signal is transmitted to the callee side terminal (31). The SIP server (24) transmits a warning signal to the callee side terminal (31) if the number of times of number conversion is equal to or greater than a predetermined number as a specific condition.

When an SIP server (24) receives a call signal addressed to a callee side terminal (31), a number conversion history set by an SIP server (22) that has transferred the call signal in a transfer service involved with a number conversion is read from the call signal, and if the number conversion history meets a specific condition, a warning signal is transmitted to the callee side terminal (31) before the call signal is transmitted to the callee side terminal (31). The SIP server (24) transmits a warning signal to the callee side terminal (31) if the number of times of number conversion is equal to or greater than a predetermined number as a specific condition.

Methods, systems and computer program products are provided for aggregating active speaker channels, receiving, through an input interface, a selection of a solo speaker channel representing one of the plurality of speaker channels and setting the audio level of any one of the solo speaker channel and at least one non-solo speaker channel, or a combination of both the solo speaker channel and the at least one non-solo speaker channel.

Methods, systems and computer program products are provided for aggregating active speaker channels, receiving, through an input interface, a selection of a solo speaker channel representing one of the plurality of speaker channels and setting the audio level of any one of the solo speaker channel and at least one non-solo speaker channel, or a combination of both the solo speaker channel and the at least one non-solo speaker channel.

Disclosed is a system for providing contact center services in an integrated way, in which a client can receive query processing services by immediately connecting to at least one of other contact center servers operated by service providers cooperating in a link service by a call transfer without changing a preexisting connection state while being initially connected to a specific contact center server, so that a user can use a plurality of query processing services without difficulties by linking the contact center servers operated by the plurality of service providers, thereby minimizing the time, efforts and costs of the user who wants to receive the plurality of query processing services through the plurality of service providers.

An apparatus is disclosed. For example, the apparatus includes a first communication interface to establish a first communication path with a first endpoint device, a second communication interface to establish a second communication path with a second endpoint device, wherein the second endpoint device is to establish a voice call with the first endpoint device, a processor, and a non-transitory computer-readable medium storing a plurality of instructions. The instructions when executed by the processor cause the processor to detect a request to transfer the second communication path from the second endpoint device to a third endpoint device, wherein the request includes information obtained by the third endpoint device via near field communications (NFC) with the second endpoint device and transfer the second communication path from the second endpoint device to the third endpoint device to disconnect the second endpoint device.

Video-assisted presence detection is used to enhance a user experience in telephony communications. Image data, video data, or both, from a camera are used to determine whether a user is present at their device before a call is transferred to him or her. The video-assisted presence detection can be implemented based on a privacy setting. For example, one implementation allows a system to have partial access to the camera to perform a scan to detect that there is a human present without capturing facial information, and without identifying that person. Another implementation allows the system to have partial access to the camera to scan the a face of a user, but not have access to the video feed of the camera. Another implementation allows the system to have full access to the camera.

Video-assisted presence detection is used to enhance a user experience in telephony communications. Image data, video data, or both, from a camera are used to determine whether a user is present at their device before a call is transferred to him or her. The video-assisted presence detection can be implemented based on a privacy setting. For example, one implementation allows a system to have partial access to the camera to perform a scan to detect that there is a human present without capturing facial information, and without identifying that person. Another implementation allows the system to have partial access to the camera to scan the a face of a user, but not have access to the video feed of the camera. Another implementation allows the system to have full access to the camera.

Techniques for determining a global state for multiple related calls are disclosed. A first call between a first device and a second device is established, where the first call is assigned a user call identifier. A second call between the first device and a third device is established. A shared call operation is established by assigning the user call identifier to the second call. The user call identifier is assigned to the second call in addition to already being assigned to the first call. A first status of the first call and a second status of the second call are determined. The first status and the second status are used to determine a global state of the shared call operation. The global state of the shared call operation is updated in response to one or both of the first status or the second status changing.

Techniques for determining a global state for multiple related calls are disclosed. A first call between a first device and a second device is established, where the first call is assigned a user call identifier. A second call between the first device and a third device is established. A shared call operation is established by assigning the user call identifier to the second call. The user call identifier is assigned to the second call in addition to already being assigned to the first call. A first status of the first call and a second status of the second call are determined. The first status and the second status are used to determine a global state of the shared call operation. The global state of the shared call operation is updated in response to one or both of the first status or the second status changing.