HU196024B - Circuit unit for generating supply and marker voltages favourably for stored program controlled telephone exchanges - Google Patents

Abstract

Field of the Invention The present invention relates to a power supply and signal voltage generating circuit unit (TJE) for preferably stored program controlled telephone exchanges, which are connected to a public utility network by a supply line (1) and in which a voltage converter (EA) is primarily used for a pair (2) of a power supply cable (6) with auxiliary power supply cable (23). ) and an input voltage line (9) for a power supply unit (ET), a switching field input line (16) for a switching power supply unit (KMT), an input power cable (18) for a signaling circuit (HA); the power supply unit (ET) for the outgoing tensioned cable (10); a switching field power supply unit (KMT) switching field for output line (17); the signaling circuit (HA) is connected to an outgoing signal line (19) and a pair of signaling signal circuit (TJE) signal line pairs (2) to the call signaling switch (HVJ), control signal function point (A) of the controller (24) via control circuit (VE), power cable (6) for power bridge circuits (TH), output voltage wire (10) for call elbow switch (HVJ) and control circuit (VE), power line points (Bl ... Bn) output through the supply lines (12) to the control circuit (VE), the connecting line (13) to the connection point (C), the switching field (17) of the switching field is connected to the switching field (KM). The invention is characterized in that the prohibition circuit (HVJT) is the supply voltage through the line (4) to the primary voltage converter (via the EAX power cable (5) to the call signal switch (HVJ), via the connecting line (7) to the proper operation of the controller (Αχ a)). switching field via output line (17) to power supply unit (KMT) of switching field; power supply unit (ET) with signal line (14) and remote switching cable (15) for data backup circuit (AM); stand-by mode power circuit (SB) input power brush (ll) ) is connected to the power supply unit (ET) and the outlet power cable (26) to the supply line points (Bl ... Bn) (Figure 1) -1-

Description

BACKGROUND OF THE INVENTION The present invention relates to a unit for generating power and signaling voltages, preferably for stored program controlled telephone exchanges.

Stored program-controlled PBXs are powered. and signaling voltages There are many known solutions for providing these voltages. These solutions may include AC / DC, DC / DC, DC / AC, AC / AC voltage converters in different numbers and arrangements according to the structure of the given telephone exchange. In lower capacity telephone exchanges, power and signaling voltages can be generated by a single device, while in larger exchanges this is achieved by connecting multiple devices to an organic unit.

Regarding the operation of telephone exchanges, from the operator's power supply side, there are two conditions:

- dependent on the public utility grid, or - uninterrupted.

Operating conditions dependent on the utility power grid are typically used in office, office, and office applications with a capacity less than 60 lines. The operation of the control panel in this case depends on the existence of a voltage in the public utility electricity network. The condition of uninterrupted operation requires a continuous operation from the telephone exchange, irrespective of the voltage of the public utility network. In this case the source of energy is primarily the public utility network, but buffer batteries and, if necessary, aggregators are installed.

Thus, the power signaling voltages of stored program-controlled telephone exchanges can be produced, particularly in low-power centers (office, office applications), directly from the utility power supply by providing a unit that directly generates the power and signal voltages from the utility power supply. and, indirectly, from the voltage of the public utility network or from the voltage of the aggregator, or directly from the voltage of the buffer batteries, by means of a voltage supply system which performs a multi-level voltage conversion.

Stored program-controlled call centers must provide:

- TTL or TTL compliant circuits, - power bridges, - power supply to the switch box, and - the call signal switching voltage, as well as signaling voltages (call signal, dial, wait, ring, alert and secret).

There are many solutions known to generate voltages from the public utility power supply or from the buffer battery voltage that are required in stored program-controlled telephone exchanges.

Such solutions are described in pL by Siemens Components 1984/6. pages 259-264, Siemens Components 1985/1. 11-13. pages, Electronic System ESM 1976/3. number, which describes the ESAD system. The power supply of the stored program controlled telephone exchanges can be considered as basically solved by reference to the fend literature, as is the case with the generation of signaling voltages. Stored program controlled. PBXs have a number of features (individually programmable shortcuts, programmable categories, etc.) that are only beneficial if they can be provided automatically even after short shutdowns and power offs, without the need for hourly programming, due to possible environmental effects.

In other cases, it is extremely important to prevent the issuance of false or unjustified call tones, which can occur for various reasons.

In stored program-controlled telephone exchanges, it is possible to rebuild a speech connection after a power failure. This is of particular importance for low capacity centers in office, office applications where the public utility power grid may be briefly missed (up to 100 ms), especially where there is overhead (windy, stormy weather).

SUMMARY OF THE INVENTION The present invention is based on the discovery that it is economical to provide a power unit and a signal generating circuit assembly that can provide the control panel, controller or controller with data backup conditions, stand-by mode, and circuitry to provide knows how to disallow unauthorized calling.

In the prior art, the foregoing is not implemented in the power supply. It must be implemented in other circuits of the control panel eg. stand-by circuitry, generating data start signal, disabling unauthorized call signal output.

These solutions are disadvantageous because they sometimes need to be implemented in more places; e.g. a stand-by circuit in multiple memory environments is required in different circuit units, a more sophisticated solution can be used to generate a data backup signal, and the control circuit is similarly prevented from disallowing unauthorized calling signals because the required information outside the power supply is can be processed.

Our aim is to eliminate the above disadvantages, i.e. to create a circuit arrangement that solves the above tasks economically.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a power unit and signaling circuitry unit according to the present invention preferably for stored program-controlled telephone exchanges, powered by a power line to the public utility network, and having a primary voltage converter with an input line connected to a power supply unit, with an input power line connected to a signal circuit. The power supply unit is connected to an output voltage line, the signal tone circuit to an output signal line, and a pair of wires of the circuitry generating the power and signal voltages to a call signal switch, a control function sensor point to a control circuit, a power supply.

the output voltage line is connected to the call signal switch and the control circuit, the supply line points are connected via the output supply lines to the control circuit, the connecting line to the connection point, the switching field output line to the switching field. It is an object of the present invention to provide a blocking circuit via a power line to a primary voltage converter via a power line to a call signal switch, a connecting line to a function-sensing point of the switch, a switch-field output line to a switch-field power supply unit and wired to a data backup circuit, a stand-by mode power circuit is connected to the power supply unit by an input power cable and an output power cable to the power supply points. Detailed Description of the Invention

Fig. 1 is a block diagram of a block diagram of the TJE power and signaling voltage generating circuit according to the invention, and Fig. 2 is a block diagram of the HVJT blocking circuit of the TJE power and signaling voltage generating circuit according to the invention, Fig. 3. Fig. 4 shows an exemplary solution of the HVJT disabling circuit, and Fig. 5 shows a possible solution of the AM data rescue circuit.

As shown in Figure 1, the TJE Power and Signal Voltage Circuit Unit has EA primary voltage converter, HA signal circuit, KMT switch field power supply unit, TTL or TTL compliant electronic circuits ET power supply unit, STP standby power mode, circuit and HVJT prohibit circuit.

* EA Primary Voltage Converters with 1 Power Cord to Utility Network, 2 Call Signs to Voltage Pair to HVJ Call Signal Switch, 4 Power Cables to HVJT Bypass Circuit, 6 Power Cables to HVJT Bypass Circuit, and Power Supply Circuit 23, for the ET power supply unit and the AM data backup circuit, 16 switching input wires for the KMT switching power supply, 18 input wiring for the HA signaling circuit, VE control circuit 8 for the indirect command line for the HVJ call signal switch, 24 signaling control circuits VE points and 7 interconnecting wires to the HVJT barrier circuit, with 12 outgoing power lines B1 .. Bn power points and 26 outgoing power lines to SB stand-by operation mode power circuit, with 25 command wires through connection point C and 13 interconnecting wires to AM rescue circuit, HVJT disable circuit 5 power supply unit 10 Amplitude wires to HVJ call signal bypass switch and VE control circuit to power supply 11, power supply By means of signaling wire 14 and remote control wire 15 to the data backup circuit AM, switching power supply unit of the KMT switching field is connected to the HVJT bypass wire 17 and to the KM switching field, and to the HVJ calling signal (The individual wires may physically appear as multiple parallel wires.) The primary voltage converter 1A of the TJE power supply and signaling circuitry unit is connected to the public utility power supply via power lines. EA's primary voltage converter generates unmounted DC and AC voltages from the public utility mains voltage. Achcd is allowed for the unregulated + 10-15% change in voltage of the public utility mains voltage at the EA primary voltage converter output, where the voltages generated by the EA primary voltage converter are used directly in the telephone exchange. Power supply and signaling voltages are provided to the more demanding circuit units by adding additional circuits.

The call signal generated by the primary voltage converter EA passes through the call signal pair 2 to the call center switch HVJ of the telephone exchange. The call signal is transmitted to the called subscriber line via the call signal output 3 of the HVJ call signal switch. The VE control circuit controls the output of the call signal via the indirect command line 8 in the call signal switch HVJ. The HVJ call signal switch is powered by two units, one from the HVJT blocking circuit on the power line 5 and the other from the ET power supply unit on the Output voltage line 10. The EA primary voltage converter on the input power lines 18 supplies the voltage to the HA signal circuit. The output of the HA signaling circuit on the outgoing signal line 19 provides the control panel with the necessary signaling tones (dialing, secrecy, busy, ringing, alerting, and waiting). The HA signaling circuit is a multi-output DC / AC voltage converter. The primary voltage converter EA supplies power to the power supply unit of the KMT switching field via the switching line input line 16. The power supply unit of the KMT switching field supplies power to the power supply unit of the switching field 17, the power supply unit of the KMT switching field supplies power to the switching field 17 of the switching field. The power supply unit of the KMT switch box is an OCjÜC voltage converter.

The primary voltage converter EA supplies power to the power supply circuits TH via the power supply line 6 and is connected to the HVJT barrier circuit via the same wire.

The HVJT barrier circuit shown in FIG. 2 is comprised of a switch element KE, a VF monitoring circuit, and a TF power bridge monitoring circuit. The switching element KE is connected to the power supply line 4, the power supply line 5 through the output line 20 of the power bridges, the power bridge monitoring circuit TF, the connecting line 7 to the VF monitoring circuit, the output line terminal 17 and the output circuit monitoring circuit 21 circuit, the TF monitoring circuit is even connected to the power supply line 6.

HVJT Prohibit Circuit KE Switch Input-31

196,024 te are connected to the EA primary voltage converter via 4 power lines. Switch KE provides power to the HVJ call signal switch via the power line 5. The lack of power to the HVJ call signal switch prevents the call signal from reaching the call signal output of the HVJ call signal switch. The TF power bridge monitoring circuit of the HVJT barrier circuit is connected to the primary voltage converter EA via the power bridge wire 6. If the power bridge circuits of the power bridge 6 are no longer energized, the call signal to the called subscribers becomes illegal, and therefore the power bridge monitoring circuit TF disables the switching element KE via the power bridge output line. The monitoring circuit VF of the blocking circuit HVJT is connected to point A via the connecting lead 7 Point A is connected to the signaling wire 24 to the control circuit VE.

If the VE control circuit operates differently from its intended operation, the VF monitoring circuit, through the output line of the monitoring circuit 21, signals to the TF power bridge monitoring circuit, which causes it, like the TH power circuit circuits to be disconnected, to operation of the KE switching element.

The other input of the VF monitoring circuit at the output of the power supply unit of the switching field 17 is below the level required to operate the switching field KM, the VF monitoring circuit sends a signal to the TF power bridge monitoring circuit through the output line 20 of the power supply bridge. disables the KE switch element,

Figure 4 shows a detailed exemplary structure of the HVJT blocking circuit assembly according to Figure 2.

Like these, the switching element KE comprises a relay having a diode connected in parallel with one coil, one point of the coil is connected to ground, another point is connected to the output wire of power bridges 20, and one point of the relay contact is to the power supply line join.

The power bridge monitoring circuit TF consists of a transistor with two resistors and a Zener diode, where the collector of the transistor is connected to the output wire 20 of the bridges, its emitter is connected to the output wire 6 and its base and Zener diode cathode. (The output wire of monitoring circuit 21 is indicated by a line in Figure 2.)

The monitoring circuit VF comprises an optocoupler, the input of which is connected via a resistor to the output wire 17 of the switching field and to the connecting wire 7 and its output to the output wire of the monitoring circuit 21 (indicated by two lines).

The power supply circuit of the stand-by mode SB is connected via the input power line 11 to the power supply unit ET, and via the output power line 26 to the power supply points B1 ... Bn and the output power line 12 to the VE control circuit. The VE control circuit is not considered to be a single controller, but may also have intelligent peripherals in the control panel, which also have a separate controller. Placing the SB stand-by mode power supply circuit in the TJE power and signaling voltage generating circuit is advantageous because a single SB stand-by mode power supply circuit can provide stand-by operation throughout the control panel.

The primary voltage converter EA supplies power to the internal control circuits of the ET power supply via the auxiliary power line 23 and provides the required power to the input voltage line 9, from which the ET power supply unit supplies the required power to the output voltage 10. The VT power supply unit is a DC / DC voltage converter with protection circuits as well as external intervention and output signals.

The data backup circuit AM is structured as shown in Figure 3, where the ETFB voltage monitoring circuit and the ETK remote switching unit are connected via the input voltage line 9 to the primary voltage converter EA of Figure 1 and the ET power supply unit.

The ETFB Voltage Monitoring Circuit is connected to the ETK Remote Switch Unit and the ETFK Signal Switch Circuit with 22 output signal lines. The signal switch circuit ETFK is connected by means of the connecting lead 13 to the connection point C shown in Fig. 1 and by the signaling lead 14 to the ET power supply unit. The ETK remote control unit is connected to the ET power supply unit by means of a remote control switch 15.

The ETFB voltage monitoring circuit, via the input voltage line 9, sends a signal to the ETK remote control unit and the ETFK signal circuit when the voltage level drops to a metatarsal value. The ETK remote control unit sends a power off command via the remote control line 15 to the ET power supply unit, which maintains the signal until the voltage on the input voltage line 9 reaches a specified voltage. This voltage is higher than the triggering signal. After the power-off signal appears, the voltage on the output power line 10 of the ET power supply unit begins to drop with a minimum delay of 50 ms and then disappears, which is provided by the buffer elements of the circuit. The signaling circuit ETFK causes the signal on the output line 22 to send a signal to the connecting point 13 on the connecting line 13 and to transmit the signal on the command line 25 to the VE control circuit for starting to save the data.

The ETFK signal switch circuit is connected to the ET power supply unit via signal line 14. The ETFK signal switch circuit, sensing a decrease in the output voltage of the ET power supply unit, transmits a signal to the connecting point 13 on the interconnection line 13 and transmits the signal to the control circuit VE to start storing data on the command line 25. The AM data backup circuit, by switching off the ET power supply unit, ensures that the low voltage on the input voltage line 9 will prevent the VE control circuit from entering into a malfunctioning duty cycle.

The AM backup circuit and its units are described in more detail in connection with an exemplary embodiment in accordance with FIG.

196 024

Figure 5 illustrates a possible circuit with notations known to those skilled in the art without dimensioning.

The type of integrated circuit in the ETFB voltage monitoring circuit is e.g. μΑ 723.

The inventive idea described in the TJE power and signaling circuitry generating unit is applicable not only to the power supply unit of stored program controlled telephone exchanges operating depending on the public utility network, but also to uninterrupted operation, in case of major malfunction (eg control unit) or maintenance.

Claims (3)

A power supply and signaling voltage generating circuit unit (TJE), preferably for a stored program controlled telephone exchange, which is connected to a utility network by a power line (1) and in which a primary voltage converter (EA) for a signal pair (2), power bridge (6) to wire (23) and input voltage to wire (9) to power supply unit (ET), to switching field input line (16) to switching field power supply unit (KMT) to input power line (18) to signaling circuit (HA): to power supply unit (ET) output (10); switching field power supply unit (KMT) to switching field output line (17Y to signaling circuit (HA) output signal line (19), and power and signaling circuitry (TJE) calling signal line pair (2) to call signaling switch (HVJ), functioning sensor ponr (A) via signal wire (24) to control circuit (VE), power bridge wire (6) to power circuit (Tri), output voltage wire (10) to call signal switch (riVJ) and control circuit (VE) , the points of the power line (Kill you) are connected to the control circuit (VE) via the outgoing power line (12), the connecting cable (13) to the connection point (C), the output line of the switching field (17) 5, characterized in that the blocking circuit (HVJT) via the power supply line (4) to the primary voltage converter (EA), the power supply line (5) to the call signal switch (HVJ), the connecting line (7) to the controller for its intended operation (A), the switching field θ through the output line (17) to the switching power supply unit (KMT); the power supply unit (ET) with a signal line (14) and a remote switch line (15) for a data rescue circuit (AM); The stand-by mode power supply circuit (SB) is connected to the power supply unit (ET) via an input power supply line (11) and to the supply supply points (B1 ... Bn) via an output supply line (26). The power supply and signaling circuit unit (TJE) according to claim 1, characterized in that the blocking circuit (HVJT) A switching element (KE) for the power supply line (4), the power supply line (5), and the power bridge monitoring circuit (TF) through the power supply output line (20); a power bridge monitoring circuit (TF) for the power bridge wire (6) and a monitoring circuit (VF) through the monitoring circuit output line (21); for the monitoring circuit (VF) 25 is connected to the connecting line (7) and the switching field output line (17). The power supply and signaling circuit assembly according to claim 1 or 2, characterized in that the voltage monitoring circuit in the data backup circuit (AM) is 30 (ETFB) for an input voltage line (9), an output signal line (22) for a signal switching circuit (ETEK) and a remote switching unit (ETK); a signal switching circuit (ETFK) for the connecting lead (13) and the signaling lead (14); and the Remote Switch Unit (ETK) is connected to the Remote Switch Cable (15) and the Input Voltage Cable (9).