| 摘要 |
PROBLEM TO BE SOLVED: To allow a caller to save labor and time for entering the telephone number of the caller himself, when the caller requests call-back. SOLUTION: When a call is incoming from a trunk line to a key telephone system 1, and the user of a telephone set 7 is unable to answer due to the absence of the user, this incoming call is transferred to a voice mail device 8. A message from the caller is stored in a storage part 82 of the voice mail device 8. On the other hand, at the time of incoming a call from the turn line, an modem signal receiving part 6 of the key telephone system 1 receives a caller number transmitted from the trunk line by a caller telephone number service, and a central controlling part 2 transmits the received result to the voice mail device 8. The voice mail device 8 stores this in the storage part 82 by making it correspond to the message. When the message is confirmed, the caller number corresponding to the message is read, and transmitted from a dial transmitting circuit 42.
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