Control means of an exchange comprising connection means for accommodating a telephone and the control means for controlling the accommodated telephone, receives a dial signal from the telephone without causing the telephone to respond to an incoming call when the telephone that is performing incoming call ringing is hooked off, causes the hooked-off telephone to respond to the incoming call when the received dial signal is a first dial signal, and causes the telephone as a call source to make a call without causing the hooked-off telephone to respond to the incoming call when the received dial signal is a second dial signal. Thereby, it is possible to make a call even during incoming call ringing.

A method of operating a network server, such as a mobile application gateway, connect devices on a cellular or carrier network with individual networks, such as enterprise voice and data networks or residential networks. The effects of the present invention are far reaching in terms of transferring effective call control from the cellular network into the control of the individual network, such as the enterprise, and enabling new business models for the purchase of cellular service from a public cellular carrier by an enterprise.

A method of operating a network server, such as a mobile application gateway, connect devices on a cellular or carrier network with individual networks, such as enterprise voice and data networks or residential networks. The effects of the present invention are far reaching in terms of transferring effective call control from the cellular network into the control of the individual network, such as the enterprise, and enabling new business models for the purchase of cellular service from a public cellular carrier by an enterprise.

A system, server, and method of DTMF detection in a VoIP network.

A system, server, and method of DTMF detection in a VoIP network.

A method of establishing a communication link between a mobile terminal of a wireless network and a subscriber of a network, such as an enterprise network, and/or a residential network.

A method of establishing a communication link between a mobile terminal of a wireless network and a subscriber of a network, such as an enterprise network, and/or a residential network.

A system includes: a first telephone; a relay that manages first accommodation position information of the first telephone; and an exchange that includes a management table that manages second telephone identification information, second accommodation position information of a second telephone connected to the relay, and an extension number of each of a plurality of the second telephones, receives first telephone identification information and the first accommodation position information, when the first telephone identification information does not match with any one of the second telephone identification information registered, and the first accommodation position information matches with one of the second accommodation position information in the management table, changes second telephone identification information corresponding to the matched second accommodation position information to the first telephone identification information, and uses an extension number corresponding to the matched second accommodation position information as an extension number of the first telephone.

A system includes: a first telephone; a relay that manages first accommodation position information of the first telephone; and an exchange that includes a management table that manages second telephone identification information, second accommodation position information of a second telephone connected to the relay, and an extension number of each of a plurality of the second telephones, receives first telephone identification information and the first accommodation position information, when the first telephone identification information does not match with any one of the second telephone identification information registered, and the first accommodation position information matches with one of the second accommodation position information in the management table, changes second telephone identification information corresponding to the matched second accommodation position information to the first telephone identification information, and uses an extension number corresponding to the matched second accommodation position information as an extension number of the first telephone.

A method of operating a network server, such as a mobile application gateway, connect devices on a cellular or carrier network with individual networks, such as enterprise voice and data networks or residential networks. The effects of the present invention are far reaching in terms of transferring effective call control from the cellular network into the control of the individual network, such as the enterprise, and enabling new business models for the purchase of cellular service from a public cellular carrier by an enterprise.