JPH0392040A - Facsimile telegraphy control system - Google Patents

Abstract

PURPOSE:To prevent the production of artificial mistake by allowing a center station to control line selection and data collision and transmission a facsimile telegraphy data between stations with a time division multiplex signal. CONSTITUTION:The main automatic controller 5 of a center station 21 applies the control of simultaneous facsimile telegraphy to slave stations 22, 23, the assignment of a time division channel to be used, the selection and assignment of an idle channel when a facsimile telegraphy request from the slave stations 22, 23 is received, priority setting to the facsimile telegraphy request from plural slave stations and collision monitoring control of transmission signals, etc. The slave automatic controller 6 of the slave station 22 sends/receives a line control signal to/from a master automatic controller 5 via a time division multiplexer 2, a transmission branching line 4, and a time division multiplexer 1 and a data signal for facsimile telegraphy and a protocol signal. Thus, the slave station is subjected to automatic switching control of line to prevent artificial mistake.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a paper transmission control system, and more particularly to a paper transmission control system that automatically performs line selection and collision control of paper transmission signals. [Prior Art] Recently, paper transmission such as facsimile using public lines and private lines has become widespread, and transmission between multiple stations equipped with a paper transmitter and a paper receiver, or between stations equipped only with a paper receiver, has recently become widespread. Paper and electronic transmissions are being sent and received. Now, when a center station has a broadcast paper transmission line to multiple slave stations, it is possible to use this broadcast transmission line to transmit paper from a slave station with a paper transmitter to the center station or other slave stations. It will be done. Traditionally, in the case of this type of paper transmission, the central office was contacted and
Paper transmission was performed by manually switching between the sending mode and receiving mode between the slave station sending the paper and the receiving station.

[Problem to be solved by the invention]

Since the above-mentioned conventional paper transmission control system performs switching manually, it has the disadvantage that confirmation operations before and after switching take time, and human errors such as communication errors and switching errors are likely to occur.

[Means to solve the problem]

The paper transmission control system of the present invention is a paper transmission control system that performs paper transmission between a center station and a plurality of slave stations using a transmission branch line, in which one transmission channel is provided between a center station and a plurality of slave stations. The center station controls line selection and data collision, and the paper data is transmitted between each station using time division multiplexed signals. [Example] Next, the present invention will be explained with reference to the drawings. Figure 1 is a system diagram of a paper transmission control system according to an embodiment of the present invention. The embodiment shown in FIG. 1 shows the line configuration of this system, which includes a center station 21, a thousand stations 22, 23, and a transmission branch line 4 connecting these stations. The center station 21 consists of a time division multiplexer 1 having a plurality of transmission/reception channels for paper transmission, a paper transmitter 7, a paper receiver 8, and a main automatic controller 5. The main automatic control device 5 manages paper transmissions between the center station and all slave stations of this line, that is, broadcast paper transmissions to slave stations, assigns time division channels to be used, and requests paper transmissions from slave stations. It performs controls such as selecting and allocating vacant channels when there is a problem, setting priorities for paper transmission requests from multiple slave stations, and monitoring and controlling transmission signal collisions. The slave station 22 includes a time division multiplexer 2, a paper transmitter 7, a paper receiver 8, and a slave automatic controller 6. The slave automatic control device sends and receives line control signals to and from the main automatic control device 5 via the time division multiplexing device 2, the transmission branch line 4, and the time division multiplexing device 1, and sends and receives protocol signals and data signals for paper transmission. conduct. Therefore, when specifically transmitting paper from the paper transmitter 7 of the 1,000 stations 22 to the paper receiver 8 of the center station 21 or slave station 23, the main automatic control device 6 must be given permission to borrow the line and instructions to specify the channel. Depending on the received control signal, the settings of the transmission channel and the data line to the paper transmitter 7 are automatically performed. If there is an instruction signal from the main automatic control device 5 indicating that line borrowing is not possible, the data signal of the paper transmitter 7 is stopped by input to the slave automatic control device 6. Since the 1,000 station 23 is a station only for paper reception, it receives time-division channel signal designation control from the center station 21, and is sent to the center station 21 or the 1,000 station 22 as necessary.
Receive the paper transmission signal. Note that even when there are multiple stations of the 1,000-station type 22, similar operations are performed under the control of the center station 21. [Effects of the Invention] As explained above, the present invention allows the same channel to be shared when performing paper transmission between a center station and a plurality of slave stations using a transmission branch line, and the center station is provided with a main function for line monitoring and control. By installing an automatic control device, placing the automatic control device in accordance with the slave station, and having the slave station receive automatic line switching control, it is possible to effectively utilize the transmission line for paper transmission. ．． In addition, automatic switching prevents human errors and has the effect of building a more reliable system.

[Brief explanation of drawings]

Figure 1 is a system diagram of a system according to an embodiment of the present invention.

Claims (1)

[Claims] In a paper transmission control system that uses transmission branch lines to perform paper transmission between a center station and multiple slave stations, one transmission channel is provided between the center station and multiple slave stations to control line selection and data collision. This paper transmission control system is characterized in that a center station performs the above operations, and the paper transmission data is transmitted between each station using time division multiplexed signals.