| 摘要 |
PURPOSE:To make effective use of transmission line, by individually and independently making the set of call and communication path set, and making the setting and cut-off of communication path every message, in the message communication system of time dividing line exchange system. CONSTITUTION:In the communication of the message 1 to the incoming terminal 14 from the outgoing terminal 10 via a transmission station 11, relay station 21 and incoming station 13, first the communication path set request signal by the specific pattern 20 in S bits from the termianl 10 is transmitted to the signal transmission/ reception circuit 18 of exchange stations 11-13 without connecting the communication path immediately at the call set, and after the exchange station connects the communication path, the path set is informed to the terminal with the specific pattern 21 in S bits and when the terminal receives it, the message 1 is transmitted. When the transmission is finished, the exchanger cuts off the communication path by the outgoing terminal 10 stopping the delivery of the specific pattern 20 in S bits. Finally, to cut off the call, the data signal from 1 to 0 and control signal from on to off are transmitted for cutoff request. |
