RU2138925C1 - Switching device - Google Patents

Abstract

FIELD: telecommunications, in particular, equipment for commutation of channels and communication lines for reception and transmission of information signals. SUBSTANCE: device has control unit, gates, commutation control unit, commutation set, OR gates, flip-flop, indication unit. Goal of invention is achieved by introduced additional gate, three OR gates, two memory registers, decoder and additional memory units for each output of decoder, each of which has flip-flop, two gates, AND gate and two memory registers. EFFECT: increased functional capabilities due to possibility to use large number of communication channels in redirection mode with restoration of initial connections. 2 cl, 1 dwg

Description

 The invention relates to automatic switching devices and can be used in communication systems for switching channels and communication lines during transmission (reception) of various information signals.

 A device [1] is known, comprising a control panel, a channel number memory unit, a line number memory unit, a switching control unit, a switching field, an OR element, a trigger, an indication element, and six switching keys (key elements) connected one at a time to the corresponding outputs of the remote control management. This device provides connection and disconnection of communication channels with communication lines according to control commands typed on the control panel. If it is necessary to temporarily use for some other purpose, in particular, to conduct a tele-signaling remote control (TU-TS) communication session of a channel that is currently connected to any communication line, then before it is taken, the number is stored in automatic mode the line with which it was connected, and the automatic restoration of this connection at the end of the TU-TS session.

 The disadvantages of this device include its significant complexity and low reliability due to the large number of constituent elements.

 A device is known [2], adopted as a prototype, the purpose of which is similar to that described above. This device contains a control panel, switching (key) elements, an indication element, AND, OR elements, a trigger, a memory unit, a switching control unit and a switching field, and, in comparison with the previous device, is characterized by a smaller number of logical elements used, which provided a simplification of the design and increased reliability compared to the analogue. A possible option for building the prototype of the switching control unit and the switching field included in the device, characterized by a simple and elegant construction, is described in [3].

 However, the prototype device has a significant drawback in that it can be used at the same time in the TU-TS mode no more than one communication channel, while on existing communication facilities it is often necessary to use a significant number of communication channels simultaneously in the TU-TS mode. From the above it follows that the prototype device is characterized by insufficient functionality. The specified disadvantage of the prototype device is inherent in analog devices.

 The aim of the invention is to expand the functionality of the device by providing the possibility of simultaneous use in the TU-TC mode with subsequent restoration of the original connections of a large number of communication channels.

 This goal is achieved by the additional introduction of a key element, three OR elements, two memory elements, a decoder and memory blocks by the number of outputs of the deflector, each of which contains a trigger, two key elements, an And element, and two memory elements into the composition of the claimed switching device, interconnected in a certain way.

 Comparative analysis with the prototype shows that the inventive device is characterized by the presence of additional elements with the appropriate circuit design. Thus, the claimed device meets the criteria of the invention of "novelty."

 Comparison of the claimed device with other technical solutions shows that the presence in the composition of the switching devices of various elements and memory units, as well as key elements is widely known. However, due to the introduction of additional AND, OR, decoder and memory blocks in terms of the number of decoder outputs with a corresponding circuit connection between them, new properties of the claimed device appear, which are manifested in the expansion of its functionality compared to the prototype. This allows us to conclude that the technical solution meets the criterion of "significant differences".

 The drawing shows a structural diagram of the proposed switching device.

 The switching device comprises a control panel 1, first through seventh (2, 7, 15) key elements, first 8, second 9, third 10, fourth 16, fifth 17 and sixth 18 OR elements, trigger 11, indication element 12, block 13 switching control, switching field 14, first 19 and second 20 memory elements, decoder 21 and memory blocks (22-l - 22-n) by the number of outputs n of decoder 21. Each memory block 22 includes a second trigger 23, eighth 24 and ninth 26 key elements, And 25 element, third 27 and fourth 28 memory elements.

 Remote control 1 has seven outputs. The first output is for issuing the Session TU-TS command, the second output of the Connect command, the third output of the Connect command, the fourth output of the Disconnect command, the fifth output for issuing the communication channel number, the sixth output for issuing the communication line number , seventh output for issuing a session number of the TU TS.

 All key elements used in the device (2 - 7, 15, 24, 26) have two information and control inputs, and memory elements (19, 20, 27, 28) also have two recording and reading inputs.

 The switching control unit 13 has four inputs and three outputs. The first input is for receiving the “Connect” command, the second input is for receiving the “Disconnect” command, the third input receives information about the channel number, and the fourth - about the number of the communication line. The outputs of the first group are used to control the operation of the switching field 14, the second output provides information on the number of the communication line disconnected from the channel, and the third output provides the output of a control command.

 In each memory block 22, the used output of the second trigger 23 is connected to the control inputs of the eighth 24 and ninth 26 key elements and to the second input of the And 25 element, the outputs of the eighth 24 and ninth 26 key elements are connected to the recording inputs of the third 27 and fourth 28 memory elements, and the output of the And 25 element is connected to the reading inputs of the third 27 and fourth 28 memory elements.

 The components forming the proposed switching device are interconnected as follows.

 The corresponding outputs of the control panel 1 are connected to the information inputs from the first to the seventh (2 - 7, 15) key elements.

 The output of the first key element 2 is connected to the first inputs of the first 8, third 10 and fourth 16 elements OR.

 The output of the second key element 3 is connected to the second input of the first element OR 8, the first input of the second element OR 9 and to the first inputs of the elements AND 25 of all memory blocks (22-l - 22-n).

 The output of the third key element 4 is connected to the third input of the first OR element 8, the second inputs of the second 9 and fourth 16 OR elements, and to the reading input of the second memory element 20.

 The output of the fourth key element 5 is connected to the fourth input of the first element OR 8, to the second input of the third element OR 10 and to the third input of the fourth element OR 16.

 The output of the fifth key element 6 is connected to the recording input of the first memory element 19 and to the information inputs of the eighth key elements 24 of all memory blocks (22-l - 22-n).

 The output of the sixth key element 7 is connected to the recording input of the second memory element 20.

 The output of the seventh key element 15 is connected to the input of the decoder 21.

 The output of the first element OR 8 is connected to the first input of the trigger 11, the used output of which is connected to the control inputs of the first seven key elements (2 - 7, 15) and to the input of the display element 12.

 The output of the second OR element 9 is connected to the first input of the switching control unit 13.

 The output of the third element OR 10 is connected to the second input of the switching control unit 13.

 The output of the fourth OR element 16 is connected to the reading input of the first memory element 19, the output of which is connected to the first input of the fifth OR element 17.

 The output of the second memory element 20 is connected to the first input of the sixth element OR 18.

 The first outputs of the switching control unit 13 are connected to the control inputs of the switching field 14.

 The second output of the switching control unit 16 is connected to the information inputs of the ninth key elements 26 of all memory blocks (22-l - 22-n).

 The third output of the switching control unit 13 is connected to the second inputs of the trigger 11 and the second triggers 23 of all the memory blocks (22-l - 22-n).

 Each of the n-outputs of the decoder 21 is connected to the first input of the second trigger 23 of the corresponding memory block (22-l - 22-n).

 The outputs of the eighth memory elements 27 of all memory blocks 22 are connected to the corresponding inputs of the fifth element OR 17, the output of which is connected to the third input of the switching control unit 13.

 The outputs of the ninth memory elements 28 of all memory blocks 22 are connected to the corresponding inputs of the sixth OR element 18, the output of which is connected to the fourth input of the switching control unit 13.

 The operation of the switching device is as follows.

 In the initial position, the trigger 11 is in a state in which the output signal from its used output all the first seven key elements (2 - 7, 15) are open, and the display element 12 is turned off. The second triggers 23 of all memory blocks 22 are in a state in which the eighth 24 and ninth 26 key elements, as well as the And 25 elements, are closed by the output signal from their used outputs.

 To connect a certain channel with the necessary communication line, information about the channel number and the number of the communication line is received respectively at the fifth and sixth outputs of the control panel 1 and, passing through the fifth, 6th and 6th 7 open key elements, respectively, is recorded in the first 19 and second 20, respectively memory elements.

 The signal, which is a “Connect” command, comes out from the third output of the control panel 1 and, passing through the open third key element 4, enters: a) the third input of the first element OR 8, the output of which goes to the first input of trigger 11, as a result the operation of which closes all seven key elements (2 - 7, 15), prohibiting the receipt of new control commands, and the indication element 12 is triggered, signaling the impossibility of entering new control commands; b) to the second input of the second element OR 9, passing through which it enters the first input of the switching control unit 13; c) to the second input of the fourth OR element 16, passing through which it enters the reading input of the first memory element 19, as a result of which the output of the last information about the number of the communication channel to be connected passes through the fifth OR element 17 and enters the third input of the switching control unit 13; d) to the reading input of the second memory element 20, as a result of which information about the number of the communication line to be connected from the output of the latter passes through the sixth OR element 18 and enters the fourth input of the switching control unit 13.

 As a result of the arrival of control signals to the first, third and fourth inputs of the switching control unit 13, the corresponding control signals of the switching field 14 are formed in the latter, based on which the required connection between the specified channel and the communication line is made in the switching field 14. Upon the execution of the control command, a signal appears on the third output of the switching control unit 13 and arrives at the second inputs of the trigger 11, transferring it to its initial state, and all the second triggers 23, confirming their initial state.

 The disconnection process is carried out similarly and differs only in that for disconnection it is only necessary to write the number of the channel to be disconnected in the first memory element 19, after which, on the basis of the signal from the fourth output of the control panel 1, passed through the open fourth key element 5 and connected in parallel with each other 10 and the fourth 16 OR elements, the command "Disconnect" is sent to the second input of the switching control unit 13 from the output of the third OR 10 element, and the trip number is sent to the third input of the same block forward link read out from the first memory element 19 Signals received from the output of the fourth OR gate 16.

 To conduct a telecontrol session or tele-signaling (TU-TS) via any channel currently connected to the communication line, first, by a signal from the seventh output of the control panel 1, which is one of the free numbers of the TU-TS session that passed through the open seventh 15 is a key element and received at the input of the decoder 21, at the corresponding output of the decoder 21 there will be a control signal supplied to the first input of the second trigger 23 of the corresponding memory block 22. This second trigger 23 enters the operating state, as a result of which, from its used output, a resolving potential is supplied to the second outputs of the eighth 24 and ninth 26 key elements and the And element 25 of the corresponding memory block 22.

 Then, information about the channel number and the communication line to be interconnected for the duration of the TU-TS session, arriving at the fifth and sixth outputs of the control panel 1, respectively, and passing through the key elements open fifth 6 and sixth 7, respectively, is recorded in the first 19 and second 20 elements of memory. In addition, information about the number of the communication channel from the output of the fifth key element 6, passing through the open eighth key element 24, is recorded in the third memory element 27 of the corresponding memory block 22.

 When a control signal appears at the first output of the control panel 1, passed through the open key element 2 and received at the first inputs of the first 8, third 10 and fourth 16 OR elements, are carried out; a) the translation of the trigger 11 into operation, as a result of which the indication element 12 is activated and the first seven key elements (2 - 7, 15) are locked from the output of the third element OR 10, a control signal is supplied to the second input of the switching control unit 13; b) the signal from the output of the fourth element OR 16 information about the number of the communication channel is read from the first memory element 19 and is fed to the third input of the switching control unit 13.

 As a result of the receipt of control signals to the second and third inputs of the switching control unit 13, it generates control signals for opening in the switching field 14 of the specified communication channel from the communication line, which from the first output are received for execution in the switching field 14. In addition, at the second output block 13 control switching signal appears containing information about the number of the disconnected communication line. This signal is supplied to the first inputs of the ninth key elements 26 of all memory blocks 22, but passes only through the open key element 26 of that block, the number of which was previously indicated in the signal from the seventh output of the control panel 1. Having passed through the open ninth key element 26 of the corresponding memory unit 22, information about the number of the disconnected communication line is transmitted via the recording input to the fourth memory element 28, where it is stored. At the end of the process of separating the channel and the communication line from the third output of the switching control unit 13, a signal is supplied that goes to the second inputs of the second triggers 23 of all memory blocks (22-l - 22-n) and to the second input of the trigger 11, thereby transferring all the triggers to the initial state. The display element 12 is turned off. Key elements (2 - 7, 15) connected to the outputs of the control panel 1 open.

 When the output signal appears on the third output of the control panel 1, which corresponds to the “Connect” command, it occurs similarly to that described above, reading from the first 19 and second 20 memory elements the values of the numbers of the connected channel and communication line, respectively, arriving at the third and fourth inputs of block 13 control switch, the receipt at the first input of the switching control unit 13 of the control signal, perceived as a command "Connector", and the translation of the trigger 11 in working condition, which triggers the element 12 in pecifications and close the first seven key elements (2 - 7, 15). Upon execution of the connection of the channel with the communication line at the third output of the switching control unit 13, a signal appears that transfers the trigger 11 to its initial state, in which the first seven key elements (2 - 7, 15) open and the display element 12 turns off. At the same time, in the third 27 and fourth 28 memory elements of the corresponding memory unit 22, information on channel and communication line numbers disconnected for the duration of this TU-TS session will be recorded.

 Having made the next connection of the channel and the communication line in the interests of the TU-TS session, it is possible to freely carry out other switching operations, such as connecting, disconnecting the channels and communication lines, as well as organizing new TU-TS sessions within the number of outputs of the decoder 21 to which the memory blocks 22 are connected , and reconnecting at the end of the TU-TS sessions.

 Restoring the original connection on any channel is connected after it is used in the TU-TS mode as a result of the sequential receipt of two output signals from the control panel 1: indicating the session number of the TU-TS and the "Restore" command.

 A signal containing the number of the terminated TU-TS session is received from the seventh output of the control panel 1, and passing through the open seventh key element 15, is input to the decoder 21. The signal that appears at the corresponding output of the decoder 21 is fed to the first input of the second trigger 23 of the corresponding block 22 of the memory, as a result of the operation of which from its output to the second input of the element And 25 will receive a resolution potential.

 Then the signal coming from the second output of the control panel 1, passing through the open second 3 key element, is received: a) to the first inputs of the AND elements 25 of all memory blocks, as a result of which the signal reading from the third one appears at the output of the And 25 element of the corresponding memory block 22 27 and the fourth 28 memory elements information about the numbers of the channel and the communication line, which, respectively, through the fifth 17th and sixth 18th OR elements arrives at the third and fourth inputs to the switching control unit 13; b) through the first element OR 8 to the input of the trigger 11, as a result of which the first seven key elements (2 - 7, 15) will be closed, and the display element 12 will turn on; c) the input of the second element OR 9, the output of which is supplied to the first input of the switching control unit 13.

 Based on the control signals received at the first, third and fourth inputs, the control unit 13 generates and issues at its first output in the switching field 14 the corresponding control command to connect the specified channel and communication line to each other, i.e. to restore from the previous connection. Upon completion of the connection, a signal appears at the third output of the switching control unit 13, transferring all the triggers of the switching device to its initial position. The switching device is ready to execute subsequent control commands.

 As follows from the above description of the operation process of the proposed switching device, the maximum number of communication channels that are simultaneously in the TU-TS mode is determined by the capabilities of the decoder 21 and the number of memory blocks 22, i.e. can be very large, while in the prototype device in the TU-TS mode it is possible to find at the same time no more than one communication channel.

 Thus, the purpose of this invention is the expansion of the functionality of the device by ensuring the simultaneous use in the TU-TS mode with the subsequent restoration of the original connections of a large number of communication channels - achieved.

 The indisputable advantage of the proposed device is the simplicity of its design, which leads to low cost and high operational reliability. In combination with wide functional capabilities, all this contributes to the widespread use of this device in the creation of various switching devices of TU-TS systems.

 The technical and economic effect provided by the proposed device consists in the possibility of increasing the efficiency of switching communication channels of various information systems (sub systems) of communication, which results in an increase in the efficiency of the functioning of channels and the communication system as a whole.

Sources of information
1. A.S. USSR N 1494251, MKI H 04 Q 3/52, 1989, BI N 26;
2. RF patent N 2002380, IPC H 04 Q 3/52, BI N 39 - 40 (prototype).

 3. The decision to grant a patent for an invention according to application N 96116038/09, priority from 08/01/96.

Claims (2)

 1. A switching device containing a control panel, from the first to the sixth key elements, from the first to the third OR elements, a trigger, an indication element, a switching control unit and a switching field, while the outputs of the control panel are connected to the information inputs of the corresponding key elements, the output of the first the key element is connected to the first inputs of the first and third OR elements, the output of the second key element is connected to the second input of the first OR element and to the first input of the second OR element, the output is third of the first key element is connected to the third input of the first OR element and to the second input of the second OR element, the output of the fourth key element is connected to the fourth input of the first OR element and to the second input of the third OR element, the output of the first OR element is connected to the first input of the trigger, the output of the second element OR connected to the first input of the switching control unit, the output of the third element OR connected to the second input of the switching control unit, the first outputs of the switching control unit are connected to control the switching field, the third output of the switching control unit is connected to the second input of the trigger, the output of the trigger is connected to the control inputs of all six key elements and to the input of the indication element, characterized in that it includes the seventh key element, the fourth, fifth and sixth elements OR , the first and second memory elements, a decoder and memory blocks according to the number of decoder outputs, each memory block has five inputs and two outputs, while the seventh output of the control panel is connected to the information during the seventh key element, to the control input of which the trigger output is connected, the output of the seventh key element is connected to the decoder input, the outputs of the first, third and fourth key elements are connected to the corresponding inputs of the fourth OR element, the output of the fourth OR element is connected to the reading input of the first memory element, whose output is connected to one of the inputs of the fifth element OR, the output of the fifth key element is connected to the recording input of the first memory element and to the third inputs of all locks, the output of the second key element is connected to the fourth inputs of all memory blocks, the output of the third key element is connected to the read input of the second memory element, the output of the sixth key element is connected to the recording input, the output of the second memory element is connected to one of the inputs of the sixth OR element, each of the outputs of the decoder is connected to the first input of the corresponding memory unit, to the second inputs of which the third output of the switching control unit is connected, the second output of the control unit to connected by mutation to the fifth inputs of all memory blocks, the first outputs of all memory blocks are connected to the corresponding inputs of the fifth OR element, the second outputs of all memory blocks are connected to the corresponding inputs of the sixth OR element, the outputs of the fifth and sixth OR element are connected to the third and fourth inputs of the control unit, respectively switching.  2. The switching device according to claim 1, characterized in that the composition of each memory block includes a second trigger, an element And, the eighth and ninth key elements, the third and fourth memory elements, while the output of the second trigger is connected to the control inputs of the eighth and ninth key elements and with the second input of the And element, the outputs of the eighth and ninth key elements are connected to the recording inputs of the third and fourth memory elements respectively, the output of the And element is connected to the reading inputs of the third and fourth elements Names, the first and second inputs of the second trigger are respectively the first and second inputs of the memory block, the information input of the eighth key element, the first input of the element And and the information input of the ninth key element are the third, fourth and fifth inputs of the memory block, the outputs of the third and fourth memory elements are respectively the first and second outputs of the memory block.