| 摘要 |
In a communication system having a plurality of cellular telephones connected on a communication network, and a switching apparatus that manages communication functions usable in the plurality of cellular telephones, when the switching apparatus receives a communication request from a cellular telephone on the calling side, the switching apparatus determines communication functions usable in the cellular telephone to notify a cellular telephone on the receiving side, while determining communication functions usable in the cellular telephone to notify the cellular telephone, and the cellular telephones and on the calling side and receiving side display the communication functions usable in the cellular telephone as the communicating party notified from the switching apparatus, while registering the communication functions usable in the cellular telephone as the communicating party after finishing communication, respectively.
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