RU2010433C1 - Device for automatic radiotelephone communication - Google Patents

Abstract

FIELD: communication. SUBSTANCE: device includes mobile station with transceiver, mobile unit with generator of voice frequency, telephone dial and station unit composed of transceiver, receiver of voice frequency, former of pulse sequences, unit of dialling and holding of connection, transmission control unit, unit of zeroing and connection termination, unit of subscriber calling and line transformer, unit of clearing by signals of engagement of automatic telephone exchange composed of noise filter, voice frequency filter, unit of delay of operation of counter, former of signal level, unit of accurate tuning, counter of number of signals and former of clearing signal, circuit for connection of units for manual setting of connections, mobile unit of voice frequency on base of operational amplifier and zeroing unit on base of NOT-AND gate. EFFECT: improved reliability of radiotelephone communication. 5 dwg

Description

 The invention relates to radio engineering. Designed to establish automatic communication of radio stations, including simplex, with telephone subscribers and telephone network subscribers with radio stations.

 The aim of the invention is to increase the throughput of the device, its reliability and ease of use.

 In FIG. 1 shows a structural electrical diagram of a device; in FIG. 2 is a structural electrical diagram of a reset unit according to busy signals of the exchange; in FIG. 3 is a circuit diagram of a moving unit; in FIG. 4 is a circuit diagram of a tonal frequency receiver and a nulling and terminating unit; in FIG. 5 is a circuit diagram of a reset unit based on busy signals of a telephone exchange.

 An automatic radiotelephone communication device (see Fig. 1) consists of a mobile radio station 1, to the transmitter of which a mobile unit 4 is connected via a dialer 3, comprising a tone frequency generator 5 with a tuner 6 and a generator switch 7 with an on indicator 8; a stationary radio station 9, to the receiver of which, to isolate tone pulses and convert them to dialing pulses, a tone frequency receiver 10 is connected containing a filter 13, directly a tone frequency filter 11 with its adjustment device 12 and a detector 14, to the output of which a pulse train former 15 is connected for subsequent series counting and a dialing and holding unit 16, the outputs of which are connected to the voice control unit of the telephone subscriber 18 and to the reset unit for busy signals ATS 19.

 The latter contains an interference filter 25 (see Fig. 2) connected to the output of the linear transformer 17, a filter of the automatic telephone exchange of the telephone exchange ATS 29 to select tonal signals of the automatic telephone exchange with a device for fine-tuning it according to the frequency of the signals of the basic automatic telephone exchange 30, a signal conditioner 28 to provide the operation of logical devices, the output of which is connected to a device for delaying the operation of the counter from random signals 26 and then to the counter of the number of incoming signals of ATS 27, the output of which is connected to the driver of the reset signal 31 for the operation of the block zeroing and termination of the connection 20. Block 20 (see Fig. 1), made on the basis of the inverter 21, the time relay 22 and the element AND 23, connected to the manual reset button B2, as well as through a two-position switch to enable establishing a connection using the operator to the dialing unit 16, which is connected to the combined output of the block 18 to the input of the block of the call of the radio subscriber from the telephone subscriber 24.

 The device operates as follows.

 With the switch 7 (see Fig. 1) we turn on the tone generator 5 and at the same time automatically the transmitter of the mobile radio station 1. The indicator 8 and the red LED on the radio station indicate the operation of the latter. The specified tone generator is assembled on the basis of the operational amplifier D1 in the integral design (see Fig. 3) with a fine tuning device 6 based on the resistor P2. The latter is included in the feedback circuit of high-precision frequency stabilization from temperature extremes and supply voltage. The implementation of a mobile unit based on a chip type 553UD1A significantly increases the reliability of the unit in terms of climatic conditions and vibration, as well as in dimensions and power consumption (which is especially important when using the unit with wearable radio stations).

 The continuous signal of the tone generator is fed to the modulation input of the transmitter 1 through the normally closed contacts of the dialer 3. A high-frequency signal modulated by the tone frequency is fed to the input of the receiver of the base stationary radio station 9, and from there the demodulated signal is fed to the interference filter 13 (power filter, high signal amplitude etc.) of the tone frequency receiver 10 (C7, C8, D2, D3, P9, P10, see Fig. 4). From the interference filter, the signal goes directly to the tone filter 11, which is a selective system with a very narrow frequency bandwidth (about 10 Hz). It is made on the basis of the operational amplifier D2 (m / circuit 553UD1A), which, in addition to the indicated advantages, unifies it also with the generator of the mobile unit 4. The filter 11 is equipped with a fine adjustment device 12 based on the resistor P14 (see Fig. 4) included in the circuit Feedback high-precision stabilization of the resonance frequency. The amplified signal from the filter of the tone frequency 11 is fed to the detector of dialing signals 14 (D8, C16, P23, P24, see Fig. 4). From the detector output, the signal is fed to the series shaper 15 to generate pulses necessary for operation (series counting) of block 16. At the same time, the signal from the detector 14 is sent directly to block 16. At the same time, relay P1 is activated, which connects the linear transformer 17 to the telephone line with its contacts .

 Thus, by supplying a continuous tone signal, information that is accidentally recorded in the block counter 16 is automatically reset, the number installed on the software device is recorded in the specified pulse series counter, and the telephone line is held and held.

 When dialing a telephone number on a mobile node, causing an interruption of the tone frequency signal, dialing pulses cause synchronous opening of the PBX subscriber line with relay contacts P1. After dialing the number of digits corresponding to the block 16 installed on the software device or a multiple of it with intermediate digits, and turning off the tone generator 5, the mobile radio station 1 is received, and block 16 constantly holds the telephone line with the contacts of relay P1. At the same time, when the generator 5 is turned off, the unit is prepared for automatic reset during subsequent dialing. In parallel with the operation of relay P1 and holding the line, the output of the transceiver 9 is connected to a linear transformer 17. When a call signal (telephone station answer) appears on this transformer, the latter goes to the input of the transmission control unit 18 and simultaneously to the modulating input of the transmitter of the radio station 9, which is turned on transmission.

 After the answer of the PBX subscriber, the operation of block 18 is automatically controlled by the speech signals of this subscriber (similar to receiving a call) with pauses of 1-42 s after 15-20 s of continuous transmission from the telephone subscriber. The mobile subscriber controls the transmission mode in the usual way, for example, using a tangent. To end the conversation at the initiative of the mobile subscriber, the latter turns on and off the switch 7 of the tone generator, block 16 terminates the connection and the circuit returns to its original state, and the PBX subscriber listens for hang up signals.

 If the telephone subscriber disconnects (hangs up) before the mobile, then the PBX hang-up signals through the interference filter 25 are sent to the tone filter 29 and at the same time to transmit the signals to the radio subscriber to the transmission control unit 18. Filters 25 and 29 with fine tuning device 30 (see Fig. 2 and 5) are made similarly to filters 13, 11 and 12 of the tone frequency receiver 10 and operate as previously described. The extracted and amplified rebound signals from the tone filter are fed to the TTL level signal generation logic (C26, P45, P48, D14, T5) of the signal availability level former 28. If there is a signal at the output of the former 28 (one-shot V5.1) a low level is formed , which closes the transistor T4 of the device delay operation of the counter 26. The capacitor C27 is charged, preventing the accidental operation of the counter 27 (D6) from extraneous signals (for example, when coinciding with the speech signals). A single rebound signal with a duration of 0.5 s is sufficient to charge the indicated capacitor C27 and write single information to the counter 27. After eight rebound signals have passed, a high level is formed at the output of the counter, which triggers a reset signal driver 31 (single-vibrator D5.2). The latter generates a short low-level pulse arriving at the first input of the AND-NOT element 23 of the zeroing and termination unit 20, which, through the inverter 21, resets the unit (block 16 and block counter 19). Reset block 19 is made for the subsequent reception of the end signals of the exchange.

 Thus, when the ATC hang-up signals arrive, the installation returns to its initial state not after 15-20 s (as in the prototype and analogues), but after the eighth short signal (i.e., after 4 s), which significantly increases the system throughput. The implementation of the block (see Fig. 2, 5) provides for its maximum unification with other installation blocks (blocks 4 and 10), has a minimum of adjustment (only P37), the circuit is easy to manufacture, has a low power consumption (about 15 mA), reliable in work.

 In the described way, the installation also works when the called subscriber is busy.

 If the telephone subscriber is absent and does not answer the call (does not pick up the handset), the installation will automatically terminate the connection also through eight signals (in this case, long), which is convenient for the user. However, in this case, the mobile radio subscriber can terminate the connection manually by turning on and off the switch 7 of the tone generator in the intervals between sending a call signal.

 In case of any situations, including emergency situations (strong interference in the line, poor operation of the telephone exchange, etc.), a backup automatic reset of the installation is provided after any given time (usually 15-20 s) by means of a time relay 22, the output of which is connected to the second input of the AND-NOT 23. element. A manual reset button for all types of connections (B2) is provided and connected to the same input. To prevent the automatic reset of the useful connection, the telephone subscriber, when it is continuously transmitted, must make a pause (15-20 s) of 1-2 seconds pause (the duration of 15-20 s was obtained experimentally) through the specified setting.

 When a mobile radio subscriber is in an area of insecure radio reception with a base stationary radio station, as well as in the case of strong radio interference, individual pulses of dialing tones and conversational sounds may not reach the stationary receiver, which will lead to an error or inability to establish a connection. At the same time, the meaning of the transmitted information (conversation) through interrogations and repetitions, if necessary, can be understood. Therefore, for such cases, it is possible to provide assistance in establishing a connection by the operator (if any).

 For this, the fifth input of the dialing and holding block of connection 16 is connected to the common wire through the normally closed contacts of switch B3, and its normally open contacts are connected to the third input of block 20 (i.e., the common wire from switch block 16 to block 20, see Fig. 1).

 If it is necessary to manually connect the mobile radio subscriber to the telephone subscriber, the stationary site operator switches the B4 toggle switch 24 off the telephone line, dials the required telephone number on the parallel telephone and establishes communication with this subscriber. Then the operator calls the mobile radio subscriber and by pressing the button (switch) B3 connects the subscribers. In this case, when a common wire is broken with the input of block 16, high level signals are formed at all information inputs of the pulse series counter of this block.

 With almost simultaneous switching of the common wire to the second input of the AND-NOT element (see Fig. 1), recording from the information inputs to the specified counter occurs. Relay P1 is activated and a connection is established. Management of the installation (reception-transmission) and disconnection occur automatically as previously described. The reverse inclusion of the B4 toggle-switch can be made after the connection is established (or at any other time).

 Since the installation is connected to the subscriber telephone line as a terminal device with an assigned telephone number, in the case of dialing by another telephone subscriber, the scheme works as follows (Fig. 1).

 The buzzer signal ATS is fed to the input of the call block radio subscriber 24 which includes the transceiver 9 for transmission. Block 24 simultaneously sends pulses to the input of the dialer and hold connection 16 through the series shaper 15, and tonal frequency oscillations are synchronously transmitted to the telephone station call signals to the modulation input of transmitter 9. As a result, the telephone line is connected and held by relay P1 contacts.

 After termination of the call signals that all radio subscribers of the given network are listening to, the telephone subscriber clarifies with the voice the desired radio subscriber, who picks up the MT receiver of the radio station and carries out a conversation with the telephone subscriber.

 The disconnection of the connection is carried out by the method described previously. If the mobile radio subscriber does not answer the call of the telephone subscriber, then after the last termination of the call attempt (hangs up), the unit receives the end-off signals and is reset to zero after eight signals as described above.

 In case of failure (for various reasons) of block 24, the operator has the option of connecting the telephone subscriber to the radio subscriber by pressing button B3.

 Communication of radio subscribers of the same network with each other is carried out in the usual way. At the same time, when using the installation, it is possible to establish connections between mobile radio objects of different networks (frequencies) by dialing the first radio subscriber of a telephone number to which another radio subscriber is connected.

 The device is powered by radio power supplies. (56) Japanese Patent N 58-29014, CL H 04, 7/26, 1983.

 Mobile radio stations. Handbook Ed. Duty I.I.M .: Communication, 1979 p. 47-58.

Claims (3)

 1. AUTOMATIC RADIOTELEPHONE COMMUNICATION DEVICE, containing a receiving transmitter on a mobile unit, an input of which is connected to a tone generator and a serial converter in series, and a first transmitter is connected to a stationary transmitter and receiver by the fact that a reset block for busy signals of an automatic telephone exchange (PBX), a pulse generator, a dialing and retention unit, and a block are introduced termination and termination of the connection and the call block of the radio subscriber, the first and second inputs of which are connected to the primary winding of the linear transformer, the first output of which is connected to the first input of the transmission control unit, the first output of which is connected to the the input of the dialing and holding blocks, the second and third inputs of which are connected respectively to the output of the pulse train and the output of the tone frequency receiver connected to the first the input of the shaper pulse generator, the second input of which is connected to the first output of the call block of the radio subscriber, the second and third outputs of which are connected to the first and third inputs of the transmitter, the second output of which is connected to the second number and holding the connection, with the middle point of the secondary winding of the linear transformer connected to the second input and the third output of the transmitter, the third input of which is connected to the third output of the unit transmission control, at the same time the output of the reset unit for the PBX busy signals is connected to the second input of the zeroing and terminating unit, and the first and second inputs, respectively, to the first output of the linear transformer and to the second output of the dialer and the gateway the output of the transmission control unit and the third input of the call block of the radio subscriber, the fourth output of which is connected to the fourth input of the transmission control unit.  2. The device according to claim 1, characterized in that the reset unit for the PBX busy signals contains an interference filter, the input of which is the first input of the block, and the output is connected to the input of the filter for selecting the PBX tone signals, the first and second tuning inputs of which are connected to the first and the second outputs of the filter tuning block for the frequency of the PBX signals, the input of which is connected to the filter output of the PBX tones and to the input of the signal level former, the output of which is connected to the input of the delay unit of the counter from random signals, output to opogo produced at the first input is connected to the PBX number counter signals, second type of input is the input for koto.pogo sbposa counter, and an output connected to the input signal fopmipovatelya sbposa.  3. The device according to claim 1, characterized in that on the stationary node, the fifth input of the number dialing and holding unit is connected to the common wire through the normally closed contacts of the switch, the normally open contacts of which are connected to the third input of the zeroing unit and the connection.

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