Hitachi, Ltd.

Hewlett-Packard Company

Makoto Hirayama

Takahiko Kamae

Tomohide Sugimoto

Kazuhiro Kita

In executing a setup procedure of a call from a VoIP gateway on the originating side to a media gateway on the destination side via a gate keeper, an authentication key is transmitted from the gate keeper to the VoIP gateway and the media gateway. The VoIP gateway on the originating side transmits to the media gateway on the destination side an admissions confirm (ACF) after attaching the authentication key. Then, the media gateway collates the authentication key obtained from the originator VoIP gateway with the authentication key obtained from the gate keeper and continues the call setup procedure only when the two authentication keys coincide with each other. On the other hand, in case of non-coincidence, the gate keeper carries out a call release. Through this, an illegal connection call not routing through the gate keeper is excluded without fail.

Internet telephone system

In the method, speech files each representing speech information are provided. At least one of the speech files is a hyperspeech file that represents speech information and includes a hot spot specification specifying a hot spot in the speech information. The hot spot identifies additional speech information. The hot spot specification comprises a hot spot definition defining the hot spot and an identifier identifying another of the speech files that represents the additional speech information. A speech information presentation operation is iteratively performed until the desired speech information is presented. In this operation, a speech file retrieval operation that retrieves one of the speech files is performed, any hot spot specification in the speech file is extracted, a speech signal is generated from the speech file, and the speech information is presented in response to the speech signal. The speech signal includes a distinguishing portion that distinguishes each hot spot from the remainder of the speech information when the speech information is presented. When the speech information presented is not the desired speech information, a user request signal is provided during the hot spot to request presentation of the additional speech information identified by the speech information presented during the hot spot. The identifier included in the hot spot specification is referenced in response to the user request signal. The identifier identifies the speech file to be retrieved when the speech file retrieval operation is next performed.

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Yokohama, Japan

Makoto Hirayama