| 摘要 |
PROBLEM TO BE SOLVED: To transmit a voice mail through a dedicated transmission path, when a public telephone network is in a congested state by transferring the voice mail from a controller of a 1st region to a controller of a 2nd region through a transmission path except the public telephone network. SOLUTION: When a public telephone network N between A and B, which connects between a public telephone network N2 of a B region and a public telephone network N1 of an A region, in a congested state at the time of making a normal call to a telephone set a from a telephone set b, the service is not available. Then, a caller starts processing of sending a voice mail by an dialing operation of the set b (e.g. Dialing a prescribed number before the telephone number of the set a). The voice mail is sent to a voice mail controller S2 of the B region by entering the caller's voice from the receiver of the set b. Next, the controller S2 copies the voice mail in the direction of a voice mail controller S1 of the A region through a dedicated transmission path N'. Thereby, a voice mail can be sent to a voice mail controller of a region, to which a target telephone set belongs. |
