| 摘要 |
A telephone apparatus is disclosed wherein the use of the call-waiting service is provided while a dedicated call-waiting operating portion is not required. When there is a call from a third party's telephone apparatus to a first party while the first party is conducting a telephone conversation with a second party, a call-waiting unit switches the first party's line connection from the second party's telephone apparatus to the third party's telephone apparatus. A call-waiting operating portion or button is used to instruct the call-waiting unit to switch the line connection. The call-waiting operating portion is structured so that the operating portion can also be used as an operating portion that has a function other than the call-waiting function. When the call-waiting button is depressed, a CPU determines whether the line is connected and then whether the telephone apparatus is in a dialing or communication mode. Only in a case where the apparatus is in a dialing or communication mode, does the call-waiting button function. In the other cases, the CPU causes the call-waiting button to function as a function button that is normally not used during telephone conversation. For example, the call-waiting button may function as an abbreviated-dialing button, thereby reducing the number of required buttons or component parts, and thus, reduce production costs.
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