| 摘要 |
PURPOSE:To call plural transfer destinations simultaneously to transfer a call in a short time by providing a dial signal generating circuit which issues respective dial signals to individual transfer destinations simultaneously. CONSTITUTION:If a telephone set B is called by a calling telephone set A, this call signal is detected by a detecting circuit 1, and dial signals are issued to individual telephone sets C from plural dial signal generating circuits 2, and plural telephone sets D as transfer destinations are called at a time. When, for example, a telephone set D1 of plural telephone sets D responds, the polarity of the trunk line of a telephone set C1 in the calling side is inverted by a response detecting circuit 3, and a relay R1 is operated, and the telephone set B in the called side and the telephone set C1 are connected, and the telephone set A and the telephone set D1 enter into the transfer call state, and call to the other telephone sets D2-Dn is stopped. |
