| 摘要 |
PURPOSE:To improve the line utilizing factor by providing respectively the 1st and the 2nd packet exchange to the transmission and receiving side and transmitting data to a voice line with time division so as to prevent the voice from being erased during the operating procedure. CONSTITUTION:The transmission side of the voice line multiplex transmission system consists of a telephone exchange 51, a packet exchange 62 and a transmitter 53, the receiving side consists of a receiver 54, a telephone exchange 55 and a packet exchange 56, and the transmitter 53 and the receiver 54 are connected by a multiplex line 50. The voice line 571 is accommodated in the voice information detecting section 531 of the transmitter 53 and monitored at all times. Further, the line switching command is received by a line switching section 532 via a multiplex circuit 50 from the exchange 52 and the line 50 is switched to the line 571 and the packet line 572. A line switching section 542 connected to a signal receiving section 541 of the receiver 54 is controlled by the exchange 56. Data are transmitted to the line 571 with time division and multiplexing so as to prevent the voice from being erased during the operating procedure and to improve the utilizing factor of line. |
