| 摘要 |
<p>In a mobile telephone system of the prior art, generation of an RBT (Ring Back Tone) and a busy tone is realized by transmitting data registered in a network-side device to a calling-side telephone. In a mobile telephone system according to the invention, the RBT data and the like is registered in advance in the called-side telephone. When this called-side telephone is called, the data corresponding to the operating state of the called-side telephone is transmitted to the calling side telephone.</p> |
