SU483807A1 - Operational Communication Device - Google Patents

Description

I

The invention relates to telephone communication, can be used in devices that provide subscribers of mobile objects with an automatic telephone circular-selective wired connection of a local network without a central station.

It is known an operative communication device, the content of the switching unit, to the corresponding H. UJM inputs of which are connected the outputs of the automatic search unit of the free line and the line polling unit, as well as the address node. An automatic free line search unit, a switching unit, a line polling unit are connected to the communication lines.

However, when using a known device, the desired subscriber is called by voice through a loudspeaker, which increases the likelihood of a false connection. In addition, it is impossible to move the subscriber's workplace beyond the limits of the moving object.

The purpose of the invention is to reduce the likelihood of a false connection and to ensure that the workplace can be carried outside the movable object.

The proposed device is characterized in that subscriber sets, a connection unit, a number register, an alarm and call unit, a circulator distribution unit, a subscriber occupancy sample block and a pick-up unit are entered into it, and the outputs of the subscriber sets are respectively connected to the first input of the alarm and call unit , to the inputs of the switching unit, and through the connection unit, a number register connected to the input of the automatic search unit for a free line, the address node, the distribution unit of the circulator and the occupation sample block ab nent - sootvetstvuyuidim to inputs of the switching unit and the unit-hook, to the other input of which is connected through the block polling of the address lines output node, and an output unit connected to the on-hook communication links; the second output of the connection unit through the signaling and call unit is connected to the corresponding inputs of subscriber sets.

The block diagram of the device shown in the drawing.

The device contains telephone sets L-1z, subscriber sets 2i-2z, connection block 3, register number 4, signaling and call unit 5, automatic search for free line 6, switching unit 7, receiving block 8, line polling unit 9, distribution unit circulator 10, address node 11, subscriber occupancy probe 12, communication line 13-13z.

The device works as follows.

Initial state - standby mode. In this case, the polling unit lines 9 alternately connects each line to the output

address node 11. If there is a call in the line in the form of a binary code sequence, the address node turns on and analyzes this message. If the code sequence came undistorted, after a period of time necessary for the analysis of the address packet in the address node, information appears on which subscriber is calling on a given line. If the called subscriber belongs to this object, a signal is sent from the address node to the sample block of subscriber 12, which checks whether the called subscriber is talking or not. If the subscriber is free, the busy test unit issues a signal to connect the corresponding subscriber set through the switching unit 7 to the communication line 13.

After connecting to the line, the subscriber set of the called subscriber includes a call from his telephone set 1 and simultaneously sends a call control signal to the calling subscriber. As soon as the called subscriber answers the call, the call and control signal are disconnected, and the subscribers are ready for negotiations. If, however, the called subscriber is busy, the subscriber occupation sample 12 of the subscriber 12 issues a signal to the extraction unit 8, which on this line sends a signal to the subscriber in the direction of the calling subscriber. When receiving a circulator call, the address node 11 sends a signal to the distribution unit of the circulator 10, which first forcibly disconnects the subscribers if they are talking, and then connects to the line on which the call came through the circulator. Subscribers, unlike conventional communications, receive a “circulator” signal.

The caller picks up the phone. If at this time the device is servicing the other subscriber, the signaling and call unit 5 generates a signal “Busy device. If the device is free, the connection unit 3 connects the subscriber set of the calling subscriber to the register number 4, and also includes the signaling and call unit 5, and the "Invitation to the set. The caller dials the number of the desired subscriber, which is written to the number 4 register in binary code. After that, the number register searches for a free line through the automatic search unit of the free line 6 and simultaneously writes the address to the address node 11. After the subscriber connects to the selected free line, the address node starts to form an address code sequence that enters the same line.

0 If there is no free line, the subscriber from the signaling and call block 5 receives a sigal “Busy device.

After the end of the address transmission, the device goes into standby mode.

Subject invention

An operative communication device containing a switching unit, to the corresponding inputs of which are connected the outputs of the automatic free line search unit and the line poll unit, the automatic free line search unit, the switching unit, the line polling unit are connected to the communication lines, as well as the address node , so that, in order to reduce the likelihood of a false connection and to ensure the possibility of moving the workplace beyond the limits of the movable object, subscriber sets, connection block, register are entered

0 numbers, an alarm and call unit, a circulator distribution unit, a subscriber sample sample unit and a withdrawal unit, where the outputs of subscriber sets are respectively connected to the first input of the alarm and call unit, to the inputs of the switching unit, and through the connection unit, the number register connected with the input of the automatic search unit of the free line, the address node, the distribution unit of the circulator and the subscriber sample test block - to the corresponding inputs of the switching unit of the output unit, to another input of which is connected via the block polling the address lines output node, and an output unit connected to the on-hook communication lines, said second output connection unit via the signaling unit and the call is connected to the respective inputs of subscriber sets.