| 摘要 |
<p>There are provided an IP telephone system and method for establishing a connection to the IP network (4) via a public line network and performing talking by transmitting/receiving IP packet data into which audio data has been converted. In a location server (3) arranged on a PSTN (5) or the IP network (4), a public line telephone number and an IP telephone number which are attached to the line connected to a telephone terminal (1a) and a terminal identifier identifying the telephone terminal (1a) are registered while correlating them to each other. When an IVR (8) is called, the public line telephone number, the IP telephone number of the telephone terminal (1a) and/or the terminal identifier is acquired from the telephone terminal (1a) and the registration content in the location server (3) is modified via a registrer system (7). Thus, even when the location of the terminal used by a user is changed, the same IP telephone number can be used.</p> |
