| 摘要 |
A communication terminal apparatus is so adapted that when an outgoing call to the terminal of a desired party ends in failure, it is determined whether the cause of the failure is a change in the terminal number of the party's terminal. This determination is made based upon cause-indicating information contained in a message received via a communication line. In a case where it is found that the cause of the failure is a change in the party's terminal number, the new terminal number is acquired from the received message. A recall operation is then performed to place the outgoing call again, this time to the new terminal number that has been acquired.
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