| 摘要 |
<P>PROBLEM TO BE SOLVED: To enable functions such as assignment of line keys of a plurality of exchange main devices by a single IP communication terminal, simultaneous call termination, call waiting, etc. to be performed by a single terminal. Ž<P>SOLUTION: The terminal includes main device registering means for registering a port as to be variable, which is to be used when performing a communication after connecting to a plurality of exchange main devices via an IP network, calling control means for calling after selecting one of the exchange main devices to be used when performing transmission by button depression, call termination control means for performing a call termination process after determining from which main exchange the call termination is received at the time of call termination, and line key control means for performing lamp control etc. of the button relating to the plurality of the main devices which are assigned to the line keys held by the communication terminal at the time of performing call origination and termination. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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