RU546U1 - A device for connecting telephone sets to a subscriber line - Google Patents

Abstract

A device for connecting telephone sets to a subscriber line, containing two linear inputs / outputs, n first and n second subscriber inputs / outputs, a handset analyzer, the first input of which is connected to the first linear input / output, a line analyzer and a first key connected in parallel with the analyzer a tube pickup, a series-connected output analyzer, a first trigger and a first delay line, an inverter whose input is connected to the first input of the AND gate, the output of which is connected to the counter input, n outputs of which are connected to the control input of the corresponding of n second keys, the first information input of which is combined with the first linear input-output and the first input of n dividers, the second input of each of which is connected to the second information input of the corresponding second key and with the corresponding subscriber input-output, and the output of each divider through the corresponding diode is connected to the input of the second differentiating circuit, the output of which is connected to the first input of the third key and the first input to the second trigger, the inverse output of which is connected to the first input of the first OR-NOT element, the second input of which is connected to the multivibrator and the first input of the second OR-NOT element, the second input of which is connected to the inverse output of the first trigger, the second input of which is connected to the output through the corresponding diode tube pickup analyzer and the output of the second delay line, the input of which is connected to the input of the third delay line, by the direct output of the first trigger, the control inputs of the fourth, fifth and sixth keys, and information

Description

DEVICE FOR CONNECTING TELEPHONES TO THE SUBSCRIBER LINE

The utility model relates to telecommunications, in particular, to telephone communications and can be used in public telephone networks.

It is known to use the sets of relays of paired devices and diode-transistor devices DTP-2 to ensure the connection to one subscriber line of two telephone sets with individual numbers on the telephone exchange Ts13 „

The low efficiency of the use of subscriber communication lines and automatic telephone exchange capacities is due to the connection of a smaller number of telephone sets to the line due to the need for an individual number for each of them.

The closest in technical essence to the proposed technical solution is a device for connecting telephone sets to a subscriber line, containing two linear inputs / outputs, (p) first and (p) second subscriber inputs / outputs, a pick-up analyzer, the first input of which is connected to the first linear input / output, line analyzer and the first key .. connected in parallel with the pick-up analyzer, connected in series with the call analyzer, first trigger. first delay line, inverter, the output of which is connected from the first the input of the logical element And, the output of which through the first diode is connected to the clock input of the counter, (p) the outputs of which are connected to the control input of the corresponding of (p) second keys, the first information input of which is connected to the first linear input / output and the first input of each of ( o) dividers, the second input of each of which is connected to the second information input of the corresponding second key and to the corresponding first subscriber input / output, and the output of each divider through the corresponding diode is connected to the input howl .differentsiruyuschey circuit whose output is connected to a first input of the third; the key and the input of the second trigger, whose inverse output is connected to the first input of the first OR-NOT element, the second input of which is connected to the multivibrator and the first input of the second OR-NOT element, the second input of which is connected to the inverse output of the first trigger., second the input .. of which, through the corresponding diode, is connected to the output of the handset analyzer and the output of the second delay line, the input of which is connected to the input of the third delay line, with the direct output of the first trigger

and the sixth key, information inputs sheschyug {inputs of the fourth, fifth specifically to the control unit, the first input of which th key are connected in parallel

connected to the second line input / output and to the first input of the call analyzer, the second input of which is connected to the first line input / output and the first information inputs of the fourth and fifth keys, the second information inputs of which are connected, respectively, with a telephone set simulator and a line simulator, and the outputs of which are connected, respectively, with the first and second inputs of the control unit, and the output of the telephone simulator is connected to the second input of the And element, the third input of which is connected to the output of the third line and delays, the input of which is connected to the control input of the third key and the input of the first differentiating circuit, the output of which is connected to the reset input of the counter, whose clock input is connected through the diode to the output of the first OR-NOT element, and the output of the second OR-NOT element is connected to the control input of the first key , the output of the line simulator is connected to the second input of the handset analyzer, the input of the control unit and to all (p) the second subscriber inputs / outputs, and the second information input of the third key is grounded.

THEM 1

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A disadvantage of the known device is a decrease in Functional reliability when exposed to impulse noise of a telephone line, for example, interference in the form of power supply ripples from an automatic telephone exchange, comparable with the amplitude of the useful signal.

The device for connecting telephone sets to the subscriber line solves the problem of improving the functional reliability of the connection with the PBX subscribers, under the influence of impulse noise of the telephone line, for example, interference in the form of fluctuations in the supply voltage of the PBX comparable with the amplitude of the useful signal.

The essence of the utility model is that a device for connecting telephone sets to a subscriber line, containing two linear inputs / outputs, (p) first and (p) second subscriber inputs / outputs, a pick-up analyzer, the first input of which is connected to the first linear input / output, a line analyzer and a first key connected in parallel with the handset analyzer, a call analyzer connected in series, a first trigger and a first delay line, and a first inverter, the output of which is connected to the third input of the AND gate, output to through a decoupling diode, it is connected to the clock input of the counter, (p) of the outputs of which are connected to the control input of the corresponding of (p) second keys, the first information input of which is combined with the first linear input / output and the first input of (p) dividers, the second input of each of which is connected to the second information input of the corresponding second key and to the corresponding subscriber input / output, and the output of each divider through the corresponding diode is connected to the input of the second differentiating circuit, the output of which is connected nen with the first input of the third key and the first input of the second trigger, whose inverse output is connected to the first input of the first OR-NOT element, the second input of which is connected to the multivibrator and the first input of the second OR-NOT element, the second input of which is connected to the inverse output of the first trigger, the second input of which, through a corresponding diode, is connected to the output of the handset analyzer and the output of the second delay line, the input of which is connected to the input of the third delay line, by the direct output of the first trigger, the control inputs of the fourth of the fifth, sixth and sixth keys, moreover, the information input of the sixth key is connected in parallel with the control unit, the first input of which is connected to the second line input / output and the first input of the call analyzer, the second input of which is connected to the first linear inputs / outputs and the first information inputs of the fourth and fifth key, the second information inputs of which are connected, respectively, with a telephone simulator and-, a line simulator, and whose outputs are connected, respectively, with the first and second inputs of the control unit, etc. than, the output of the third delay line is connected to the second input of the And element, and the input of the mentioned delay line is connected to the control input of the third key and the input of the first differentiating circuit, the output of which is connected to the reset inputs of the counter, the clock input of which through the diode is connected to the output of the first element OR- NOT, but the output of the second OR-NOT element is connected to the control input of the first key, the output of the line simulator is connected to the second input of the pick-up / handset analyzer, the input of the control unit and to all (n) second subscriber inputs / outputs dams, and the second information input of the third key is grounded, equipped with an additional digit dialing signal processing unit consisting of a low-pass filter, a fourth delay line, a fourth logical element AND, an adder, an amplifier, a comparator, a one-shot with restart and a third differentiating circuit, while the input a low-pass filter is connected to the second linear input / output, and the output to the inputs of the fourth delay line and the second inverter, the outputs of which are each connected to the corresponding inputs of the adder, the output of which th is connected to the amplifier input and the amplifier output is connected to the input of the comparator, the comparator output is connected to the input of a monostable reset, the output of which through the third differentiating circuit connected to the first input of NAND gate I.

Figure 1 of the drawing shows a functional electrical diagram and figure 2 shows voltage diagrams of the proposed device.

A device for connecting telephone sets to a subscriber line contains a call analyzer 1, a first trigger 2, a first delay line 3 for 7 sec., A first key 4, a telephone simulator 5, (n) second keys 6, ..., 6; control unit 7, line 8 simulator, third key 9, fourth key 1O, pick-up analyzer 11, line analyzer 12, second trigger 13, first and second logical elements OR NOT 14.15, second 16 and third 17 delay lines, first inverter 18, logical element 19, multivibrator 2O, counter 21, first differentiating chain 22, fifth key 23, sixth key 24, (p) dividers 25-1, ..., 25- (p), the first and second linear input / output 26.27, the first (p) subscriber outputs 28, the second subscriber outputs 29, the second differentiating chain of the AU, block processing signals of the set of an additional digit 31, which in turn contains a Low-pass filter 32, a fourth delay line 33, a second inverter 34, an adder 35, an amplifier 36, a second comparator 37, a single vibrator with restart 38 / a multivibrator with restart), the third differentiating circuit 39.

The implementation of the used Functional nodes is known C31.

The proposed device works as follows. When an incoming connection is established, the PBX call signal is input to the analyzer 1, which receives it and converts it into a series of positive pulses received at input 8 of the first trigger 2 and setting it to a single state at the output of ЕГ. This voltage is supplied to the control input of the fourth key 1О, which connects the telephone simulator 5 to the subscriber line, providing the telephone exchange with the perception of the signal about the receiver lifting the handset. At the same time, the voltage from the output Q of trigger 2 is supplied to the control input of the sixth key 24, which disconnects the line from the common bus of the subscriber units, and the fifth key 23 connects the line simulator 8 to the common bus. The same voltage, having passed through the third delay element 17, after 1.5 seconds. From the moment the call arrives, it appears at the 2nd input of the And 19 element, permitting the dialing of an additional code corresponding to the subscriber telephone set TA1, from the line to the pulse counter 21. ..Tan.

In addition, the voltage from the output G of trigger 2, passing through the first delay line 3, after 7 seconds from the moment the call arrives, passes through the inverter 18 and inverted to the first input of the I19 element, prohibiting further flow from the line to the counter 21 pulses of dialing the additional code digit. After the incoming connection described above is set, the additional code digit dialing signal and possible impulse noise are input to the signal processing unit (digits) of the additional code 31, namely, to the input of the low-pass filter 32, which filters out high-frequency interference.

From the output of the filter 32, the signal enters the delay line 33 and the second inverter 34, and from the outputs of the nodes 33 (Fig. 41) and 34 (diagram 4O), the signals are fed to the inputs of the adder 35.

The delay time 33 is approximately equal to the duration of the set pulses. In this case, the set pulses, the amplitude of which is comparable with the amplitude of the ripple of the supply voltage with the ATS, are allocated at the output of the adder (diagram 42 of Figure 2) and then go to the input of the amplifier 36, and then to the input of the comparator 37, at the output of which receive the generated set pulses ( chart 43 of figure 2).

Impulse noise, the duration of which is comparable with the duration of the set pulses, also passes through the nodes 32-37 (diagram 44 of Figure 2) of the signal extraction unit of the dialing of the additional digit 31 and is fed to the input of the one-shot with restart 38, the voltage from the output of which (Fig. 45) is supplied the input of the differentiating target 39.

% o & no

In this case, additional code dialing pulses and impulse noise are combined into one pulse (diagram 45 of FIG. 2), if their repetition period is shorter than the time constant T of a single-vibrator 3B along the rear Front of the output pulse of which a pulse / diagram 46 is generated using the third differential circuit 39, FIG. .2 /, arriving at the first input of the I19 element, the other inputs of which are enabled with signals. From the output of the And 19 element, pulses for dialing an additional digit and impulse noise in the time interval between 1.5 s and 7 s from the moment of termination The PBX calls go to the counter-decoder 21 for counting pulses for dialing an additional digit corresponding to the number of the subscriber telephone set TA1, TA2, ..., TAn. At the same time, one of its outputs is set to a high level voltage, which is supplied to the control input of one of the second keys 6 ... 6ff connecting the called telephone between the second line input / output 26 and the second subscriber input / output 29. The low level voltage from the inverse output of the first trigger 2 goes to the first input of the second element OR- E 15, allowing the multivibrator 2O pulses pass to the control input of the first switch 4, implementing periodic shorting simulator 8 linii.Formiruya thus internal ringer. After receiving the ringing signal, the control unit 7 sends a control signal to the calling subscriber through a periodically opening first key 4. After raising the handset of the called subscriber unit, the voltage on the telephone and at the inputs of the handset analyzer 11 will decrease and a high-level pulse signal will be generated at its output, which sets the first trigger 2 of the call to zero by direct output, so the first call key 4 stops switching, and the keys 10,23,24 are set to the initial state and the called telephone will be connected to the subscriber line. The second delay line 16 sets the first trigger 2 to zero by output Q after 25 seconds, if the phone is not picked up. The first differentiating circuit 22 ensures that the counter 21 is set to zero before receiving pulses of dialing an additional digit. When an outgoing connection is established, any subscriber picks up the handset of the device. If the line is free, the pulse amplitude at the output of the corresponding divider 25 is about 1 OV and the signal passing through the differentiating circuit ZO, sets the second search trigger 13 to a single state by the inverse output, and from the inverse output 13, a low-level voltage is supplied to the first input of the first second OR-NO element 14, allowing the pulses from the multivibrator output 2O supplied to the process 21. In the pulse counting input of the counter sequentially opened second keys 6 ... 6, there is a search apparatus on which the tube is removed. At the moment of connecting such an apparatus to the line, the voltage in the line decreases, the analyzer 12 generates a pulse that enters the input R of the second trigger 13 and sets it to a single state. The pulses from the multivibrator cease to arrive at the input of the counter 21, sequential switching of its inputs stops and the desired apparatus remains connected to the line. The third key 9 prohibits the passage of pulses from lifting the tube during the action of ringing signals.

From the above description, it is obvious that the proposed device has increased resistance to impulse noise, the duration of which is comparable with the duration of the dialing pulses and interference in the form of low-frequency ripple voltage of the telephone exchange, comparable with the amplitude of the pulses of the set of digits of the digits of additional telephones.

 CH 70NO B. &. /

Claims (1)

A device for connecting telephone sets to a subscriber line, containing two linear inputs / outputs, n first and n second subscriber inputs / outputs, a handset analyzer, the first input of which is connected to the first linear input / output, a line analyzer and a first key connected in parallel with the analyzer a tube pickup, a series-connected output analyzer, a first trigger and a first delay line, an inverter whose input is connected to the first input of the AND gate, the output of which is connected to the counter input, n outputs of which are connected to the control input of the corresponding of n second keys, the first information input of which is combined with the first linear input-output and the first input of n dividers, the second input of each of which is connected to the second information input of the corresponding second key and with the corresponding subscriber input-output, and the output of each divider through the corresponding diode is connected to the input of the second differentiating circuit, the output of which is connected to the first input of the third key and the first input to the second trigger, the inverse output of which is connected to the first input of the first OR-NOT element, the second input of which is connected to the multivibrator and the first input of the second OR-NOT element, the second input of which is connected to the inverse output of the first trigger, the second input of which is connected to the output through the corresponding diode tube pickup analyzer and the output of the second delay line, the input of which is connected to the input of the third delay line, by the direct output of the first trigger, the control inputs of the fourth, fifth and sixth keys, and information the input of the sixth key is connected in parallel with the control unit, the first input of which is connected to the second line input-output and the first input of the call analyzer, the second input of which is connected to the first linear inputs and outputs and the first information inputs of the fourth and fifth keys, the second information inputs of which are connected respectively with a telephone simulator and a line simulator, the outputs of which are connected respectively to the first and second inputs of the control unit, and the output of the third delay line is connected to the input of the AND element, and the input at the marked delay line is connected to the control input of the third key and the input of the first differentiating circuit, the output of which is connected to the reset input of the counter, the clock input of which through the diode is connected to the output of the first OR element - NOT, and the output of the second OR element - NOT connected to the control input of the first key, the output of the line simulator is connected to the second input of the handset analyzer, the input of the control unit and to all n second subscriber inputs and outputs, and the second information input of the third the ground is grounded, characterized in that a low-pass filter, a fourth delay line, a fourth logic element And, an adder, an amplifier, a comparator, a one-shot with restart and a third differentiating circuit are introduced into the device, the low-pass filter input being connected to the second linear input-output, and the output - with the inputs of the fourth delay line and the fourth logical element And, the outputs of which are each connected to the corresponding input of the adder, the output of which is connected to the input of the amplifier, and the output of the amplifier is connected to the input of mparator, the output of the comparator is connected to the input of the one-shot with restart, the output of which through the third differentiating circuit is connected to the first input of the fourth logical element I.