| 摘要 |
PURPOSE:To apply a ringing tone and a ringing without delay in phase, by applying the ringing tone of a caller with a ringing tone transmitter accommodated in the network of called party side. CONSTITUTION:Different networks 11, 21 are accommodated with telephone terminals 13, 23 respectively. Each network is controlled with controllers 12, 22 individually and both the controllers exchange the control information to request the control of terminals accommodated in the network and that of other systems via a signal bus 30. A ringing tone from a ringing tone transmitter 26 accommodated in the network 21 is given to the network 11 via a channel 31. The ringing is aplied to the telephone terminal 23 via a relay provided corresponding to the telephone terminal from a ringing generator 25 to alert a bell in the telephone terminal. The phase control of the ringing tone and the ringing is performed at the controller 22. |
