| 摘要 |
The present invention aims at providing a communication apparatus accommodating both a LAN line or a broadband line and an ordinary public network (PSTN) so as to enable the simultaneous use of two lines according to two network connection methods by using a single physical line capable of accommodating the high-speed line and the public network. There are provided an IP phone having an interface for connection to an Internet line and an analog telephone having an interface for connection to a PSTN line. A control section selects an Internet telephone or a public network telephone to be used. While one telephone line is busy, the other idle line is used for communication.
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