JPS6020942B2 - Ringing signal power supply for working and standby telephones - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a calling signal power supply device for a working/standby type telephone that sends a calling signal voltage (voltage for ringing a telephone) to an exchange.

Conventional crossbar switch call signal power supplies employ a working/standby system for system reliability.

In this case, since the circuit that generates the ring signal voltage is an analog type, it was difficult to stack single capacity units, so the power supply capacity of the equipment was initially installed with the maximum exchange capacity estimated for the maximum number of telephone subscribers. Ta. Therefore, the initial capital investment was huge and uneconomical. Recently, with the introduction of electronic exchanges, the following objectives have been adopted: A. Reducing the initial capital investment; B. Increasing the number of systems by adding single-capacity call carrier signal power supply units. C. Further improving system reliability. There are demands such as

In this case, the performance of the calling signal power supply device requires that the calling signal voltages of the plurality of calling signal power supply devices be synchronized due to the functionality of the electronic alternating current machine.

In this case, the synchronization of the ringing signal voltages means that the zero cross potential of the intermittent ringing signal voltage becomes the intermittent start point and end point, and the plurality of ringing signal voltages coincide at these start and end points. It means there is. In addition, the frequency of the calling signal voltage varies depending on the national circumstances of each country, and is 16Hz.
Nine types between 66Hz and 66Hz are typical.

In this case, each ringing signal power supply device must be set to one of the same frequencies and maintained in a synchronized state. SUMMARY OF THE INVENTION An object of the present invention is to provide a calling signal control device for active and standby telephones that can satisfy the above-mentioned requirements A, B, and C.

Hereinafter, specific examples of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows an embodiment of a calling signal power supply unit 1 used in the telephone call information light source device of the present invention. In the figure, reference numeral 2 denotes a microcomputer, which includes an oscillator 3 made of, for example, a crystal oscillator and having an oscillation frequency of 1000 yen, which is used as a clock signal for the microcomputer 2, and an oscillator 3 that is used as a clock signal for the microcomputer 2, as well as the frequency, voltage value, intermittent time and A memory circuit 4\\ that stores digital quantities equivalent to synchronization signals and programs to obtain them, and a microprocessor (central processor) that has the function of sequentially processing the digital signals stored in the memory circuit 4 according to the program. It consists of 5 etc. 6 is a digital quantity (e.g., this digital sub-8-bit) base number corresponding to the calling signal voltage output from the microcomputer 2, and the peak value of the sine wave is sequentially divided into 8 bits by an appropriately frequency-divided clock signal. Output in binary.

) into an analog call signal voltage and converts the power to match the load required by the exchange side. B is a ring signal voltage output terminal output from the ring signal voltage generation circuit 6. be. Reference numeral 7 sets the operation of whether this call signal fin source unit 1 operates as a main unit or operates synchronously as a slave unit of another call signal power supply unit, based on a condition signal given from a condition signal generation circuit (not shown). In the setting circuit, A shows condition signal input.

Reference numeral 8 denotes a first interlock circuit that controls whether or not to output the output synchronization signal from the microcomputer 2 to the synchronization signal output terminal M of the calling signal power supply unit 1, using the output signal of the setting circuit 7.

Reference numeral 9 denotes a second circuit for controlling whether or not the input synchronization signal applied from another call signal power supply unit to the synchronization signal input terminal S of this call signal power supply unit 1 is supplied to the microcomputer 2 by the output signal of the setting circuit 7. This is an interlock circuit.

1. When the output synchronization signal from the microcomputer 2 is not output to the synchronization signal output terminal M under the control of the first interlock circuit 8, the input given to the synchronization signal input terminal S from the outside. This is a third interlock circuit that operates by being supplied with the output signal of the setting circuit 7 via the inverter 11 so as to output the synchronization signal as an output synchronization signal.

The operation of such a call signal magic source unit 1 differs depending on whether it is given a condition signal as a main unit or a condition signal as a slave unit from a condition signal generation circuit (not shown), so the operation will be explained separately for each case below. Explain the operation.

0 [i] When a condition signal for the main engine is given, in this case, when the condition signal for the main engine is input to the condition signal input terminal A, the setting circuit 7 sets the first, second, and third conditions. Interlock circuits 8, 9, and 101 output signals as the main engine.

When the first interlock circuit 8 is given an output signal as a main unit from the setting circuit 7, the first interlock circuit 8 controls the output synchronization signal of the microcomputer 2 to be outputted to the synchronization signal output terminal M. . As a result, a synchronizing signal can be given from this telephone ringing signal power supply unit 1 to other telephone ringing signal power supply units. When the second interlock circuit 9 is given an output signal as the main unit from the setting circuit 7, an input synchronization signal given from another telephone ringing signal power supply unit to the synchronization signal input terminal S is input to the microcomputer 2. control so that it does not occur.

When the output signal from the setting circuit 7 as the main engine is given to the third interlock circuit 10 via the inverter 11, the third interlock circuit 10 performs an operation opposite to that of the first interlock circuit 8. and synchronization signal input terminal S
The input synchronization signal given to the synchronization signal is not outputted to the synchronization signal output terminal M as an output synchronization signal.

Further, the microcomputer 2 outputs a digital signal for a calling signal and inputs it to the calling signal voltage generation circuit 6, which converts the digital amount into digital/analog.
After polarity inversion, power amplification, and waveform shaping, a predetermined calling signal voltage synchronized with the output synchronization signal is output to the calling signal voltage output terminal B. [5] When a condition signal for the slave is given, in this case, when the condition signal for the slave is input to the condition signal input terminal A, the setting circuit 7
, output signals as slave units to third interlock circuits 8, 9, and 10.

When the first interlock circuit 8 is given an output signal as a slave from the setting circuit 7, the first interlock circuit 8 controls the output synchronization signal of the microcomputer 2 so as not to output it to the synchronization signal output terminal M. do.

When the second interlock circuit 9 is given an output signal as a slave from the setting circuit 7, this Z second interlock circuit 9 receives an output signal from another telephone ring signal power supply unit to the synchronization signal input terminal S. The microcomputer 2 is controlled to input an input synchronization signal to the microcomputer 2.

As a result, the microcomputer 2 is operated in synchronization with the input synchronization signal. Third interlock circuit 10'
When a slave output signal is applied from the setting circuit 7 through the inverter 11, the operation is opposite to that of the first interlock circuit 8, and the input synchronization applied to the synchronization signal input terminal S2 is performed. It operates to output the signal as an output synchronization signal to the synchronization signal output terminal M via this third interlock circuit 10.

This world power synchronization signal is given to other telephone calling signal power supply units. 2 FIGS. 2A and 2B show an example of the synchronization relationship between the input synchronization signal and the calling signal voltage. When an input synchronization signal as shown in FIG. 2A is applied to the microcomputer 2, the microcomputer 2 stops counting in each section at the falling edge of the signal, and restarts counting at the rising edge of the signal. This operation is repeated at a period T. At the rising edge of the input synchronizing signal, the calling signal voltage begins to appear with a predetermined phase, continues for T, time, pauses for T2, starts again for L time, and stops at the falling edge of the input synchronizing signal. The times T, , T8 when the calling signal 3 voltage appears and the time when it stops are programmed in the microcomputer 2 in advance. In FIG. 1, one microcomputer 2 is used in the explanation, but two or more microcomputers may be used if there are more types of intermittent times of the calling signal voltage.
, FIG. 3 shows an example of a calling signal power supply device 12 for active and standby telephones according to the present invention, which uses the call information power supply unit 1 shown in FIG. 1. In FIG. This reinstallation 12 includes the current calling signal power supply unit 1,
4, a spare caller signal power supply unit 1, b, and a changeover switch 13 for selectively outputting the ringing signal voltage output of both units 1M 1, b from the common output terminal.
M 13,b and both selector switch 13,u. 13,b
A condition signal generation circuit 14 which supplies a condition signal specifying operation as a main machine or a slave machine to the condition signal input terminal A of both units 113, 1, b by a switching signal from the current or standby call signal power supply unit 0. 1M An OR circuit 15 that selectively outputs an output synchronization signal output from one of the synchronization signal output terminals M of 1 and b;
A common output terminal M to which an output synchronizing signal is applied and output to the outside. In addition, the current and standby calling signal power supply units 1. A, 1, and b connect the synchronizing signal output terminal M of one unit to the synchronizing signal input terminal S of the other unit to apply a synchronizing signal and achieve synchronization. In such a working/standby type telephone ring signal power supply diamond 0 layer, the changeover switch 13, a on the side of the working unit 1, a is turned on, and the changeover switch 13, b on the side of the spare unit 1, b is turned off, A calling signal voltage is output from the shared output terminal &.

On the other hand, when the selector switch 13,a is turned on, the condition signal generating circuit 14 outputs the unit 1, . Condition signal input terminal A
A condition signal as a main machine is given to the unit 1, and a condition signal as a slave machine is given to the condition signal input terminal A of units 1 and b.
As a result, unit 1,a becomes the main engine, unit 1,
b operate as slave devices. When the unit 1w operates as the main engine 0, a synchronizing signal is output from the synchronizing signal output terminal M of this unit 11a, and this synchronizing signal is applied to the synchronizing signal input terminal S of unit b, so that this unit 1.b・It is operated synchronously with a. Also,
The synchronizing signal of unit 1, a is given to other units via OR circuit 15. If unit 1, b fails during operation, changeover switch 13, a is turned off, changeover switch 13, b is turned on, and a condition signal is output from condition signal generation circuit 14, and unit 1, b will now operate as the main machine (currently used). This switching is performed while the operations of units 1 and b are synchronized with the operations of units 1 and a. Therefore, before and after switching, the shared output terminal B,
There is no change in the ringing signal voltage output from. Also, after switching, units 1, . is in a state where it is synchronously controlled by unit lib, and reswitching of units 1 and 3 after the eruption is also smoothly performed. Figure 4 shows the current use of the present invention shown in Figure 3.
This figure shows an example of a system in which a plurality of standby call signal power supplies are connected in accordance with the required power capacity and are operated synchronously.

In the figure, reference numeral 12 indicates a working/backup type telephone call signal generator having a structure as shown in FIG. 3, which operates as a main unit.
Reference numeral 2 designates a working/standby type telephone call signal fin source device which operates only as a slave device by omitting a part of the structure shown in FIG. That is, the working/standby type telephone signal power supply unit 122 that operates as a slave unit is the current call information power supply unit 12.
a, a spare call signal power supply unit 12b, and the output state Bo of selectively sharing the outputs of both units 124 and 12b.
a changeover switch 132 for switching output from 2;
13 and a working or spare calling signal power supply unit 12a.
, 12b.
The common output terminal pigeon 2 receives an output synchronization signal from the OR circuit 152 and outputs it to the outside, and the output synchronization signal output from the common output terminal Mo of the calling signal power supply device 12, which operates as the main machine, is applied. It is configured to include a common input terminal So2 which outputs this as an input synchronization signal to the synchronization signal input terminal S of each of the calling signal power supply units 12a and 1.

The calling signal power supply devices serving as slave units have the same configuration as the above-described calling signal power supply device 122, and are connected sequentially in the same manner depending on the required power capacity.

In such a system, each bag hawk 12, 122
Current unit 1M 12 side changeover switch 13, a
, 1323 are turned on, and the respective devices 12,, 1
The calling signal voltage is output from B2 of the common output terminal B of 22, respectively.

On the other hand, when the changeover switch 131a of the device 12 operating as the main unit is turned on, the condition signal generation circuit 14 supplies the condition signal as the main unit to the condition signal input terminal A of the unit 1, a, and A condition signal as a slave unit is applied to the condition signal input terminal A of the unit. As a result, unit 1.a operates as a main machine, and units 1 and b operate as slave machines. Unit 1,. When the unit operates as the main unit, a synchronization signal is output from the synchronization signal output terminal M of this unit lid, and this synchronization signal is applied to the synchronization signal input terminal S of the units 1 and b, so that the units 1 and b are synchronized with the unit 11a. be driven. Further, the synchronizing signal of unit 1.a is applied to each synchronizing signal input terminal S of each unit 12a, 12b of device 122 via OR circuit 15, etc., and these units 12a, 12b are operated in synchronization.
Each unit of the apparatus provided at the next stage of this apparatus 122 is also synchronously operated by the synchronizing signal given from the OR circuit 152 of this apparatus 122.

Unit 1, a in the device 12 operating as the main engine
If there is a failure, selector switch 13・a is off.
The changeover switches 13 and b are turned on, a condition signal is output from the condition signal generation circuit 14, and the units 1 and b begin to operate as main engines.

In the meantime, repairs are made to unit 1,a. In the device 122 that operates as a slave, when the unit 12 fails, the changeover switch 132 is turned off, the changeover switch 132b is turned on, and a calling signal voltage is output from the unit 1S.

As explained above, the call information source device for working and standby telephones according to the present invention has a built-in microcomputer and digitally outputs a ringing signal voltage and a synchronization signal. Each unit is equipped with
Moreover, since each unit is structured to operate in synchronization with a synchronization signal given from the other, it is possible to cope with an increase in power supply capacity by increasing the number of zero layers according to the power supply capacity. Therefore, according to the present invention, initial capital investment can be reduced. In addition, according to the present invention, each unit can be operated synchronously, which further improves system reliability, and when each unit is switched from active to standby, the operation of the standby unit is synchronized with the operation of the active unit. Switching can be performed smoothly in a synchronized state. Brief Description of the Drawings 0 Fig. 1 is a block diagram showing an embodiment of the calling signal power supply unit used in the present invention, and Figs. 2 A and B show the relationship between the synchronization signal and the calling signal voltage of the unit shown in Fig. 1. FIG. 3 is a block diagram showing an embodiment of the calling signal power supply device for working and standby telephones according to the present invention, and FIG. FIG. 1 is a block diagram showing an example of a signal power supply system.

1M 1,b... Calling signal power supply unit, 2.
...Microcomputer, 12,12. ...
・・・Call signal power supply diamond layer for working and standby telephones, 13,a
, 13・b...changeover switch, 14...
Condition signal generation circuit, 15, . . . OR circuit.

Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] 1 In response to a condition signal given from the other, one operates as a main unit and outputs a synchronous signal and a calling signal voltage synchronized with the synchronous signal, and the other operates as a slave unit, receiving the synchronous signal and responding to the synchronous signal. a working and standby ringing signal power supply unit which generates synchronized ringing signal voltages and which are both operated synchronously; a set of changeover switches which selectively switches and outputs the ringing signal voltage from both of these units; a condition signal generation circuit that provides the condition signal specifying operation of both units as a main unit or a slave unit by a switching signal from a set changeover switch; and a synchronous signal from the active or standby call signal power source unit. 1. A calling signal power supply device for a working/standby type telephone, characterized in that it is configured to include an OR circuit that outputs an output to a telephone.