JPH0591202A - Automatic notice equipment - Google Patents

Abstract

(57) [Summary] [Purpose] In an automatic notification device that automatically reports various information to a distant monitoring center via a general telephone subscription line, when a pink telephone line is used, data errors due to billing signal noise may occur when receiving data. It is an object of the present invention to solve the occurrence and to provide an automatic notification device with excellent performance that does not require an additional installation of an adapter when connecting a pink telephone. [Constitution] In an automatic notification device, by providing a high-pass filter circuit 18 for removing billing signal noise between the line connection unit 15 and the data transmission circuit 22, billing signal noise generated when a pink telephone line is used. It is possible to eliminate a data error in the received data due to, and an inexpensive and highly reliable network control terminal device can be obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic reporting device for automatically reporting various information and the like to a remote monitoring center via a general subscriber telephone line.

[0002]

2. Description of the Related Art Conventionally, a security system for automatically reporting security information generated in a dwelling unit to a remote monitoring center via a telephone line has a configuration as shown in FIG. In FIG. 3, 1 is a terminal side system, 2
Is the monitoring center side system. Terminal side system 1
An abnormality detection sensor 3 and a telephone 4 for communication are connected to an automatic notification device 5, and the automatic notification device 5 is connected to a telephone line 6. Now, when the abnormality detection sensor 3 detects an abnormality,
The automatic notification device 5 dials a preset monitoring center number. When receiving the dial signal, the exchange 7 connects the telephone line 6'and calls the system 2 on the monitoring center side. Data receiving device 8 in the system 2 on the monitoring center side
Automatically responds, the security data from the automatic notification device 5 is received by the data receiving device 8 via the telephone lines 6 and 6'and transferred to the data processing device 9 for processing. Although most of the automatic notification system using the general subscriber telephone line has the configuration shown in FIG. 3, it is conceivable that the telephone 4 on the terminal side is a pink telephone for business use such as an office, a cafeteria, and a coffee shop. Since the pink phone is used by inserting coins when making a call from the terminal side, a coin storage signal (inverts the polarity of the line) from the exchange of the station to the terminal side telephone at the time of answering the other party and at regular intervals ( It sends a billing signal), detects this in the telephone, and stores coins at regular intervals. However, line 6 using a pink phone
When the automatic communication device 5 is connected to and an error is reported, if the data communication time to report becomes longer than one call frequency, the data changes due to the billing signal (pulse) from the station and a data error occurs, and the monitoring center side system 2 , The terminal side system 1 cannot receive normally, and this system can be used only for a limited call period. Therefore, in order to eliminate the influence of the charging pulse on the communication, recently, as shown in the configuration of FIG. 4, the adapter 10 is connected and used between the automatic notification device 5 ', the pink telephone 11 and the telephone line 6 ". There are cases.

[0003]

However, in the system configuration of FIG. 4 which uses the pink telephone line, since the adapter is newly connected, the cost of the installation work is required in addition to the cost of the equipment, and such an automatic There was a cost disadvantage in spreading the reporting system.

The present invention solves such a conventional problem by improving the automatic notification device itself and connecting a pink telephone without an adapter to cause a data error due to a charging signal. The purpose is to provide an excellent automatic notification device that does not exist.

[0005]

In order to achieve this object, the automatic teller machine of the present invention is provided with a filter circuit for removing charging signal noise that enters from a line during communication.

[0006]

With the above structure, the billing signal noise generated when the pink telephone is used is removed by the filter circuit, and the signal level to noise level (S / N) ratio at the time of communication is improved. It can be carried out.

[0007]

1 is a schematic electrical connection diagram showing the construction of an embodiment of the present invention, and FIG. 2 is a filter characteristic diagram of the above embodiment.

In FIG. 1, a line is a line connection terminal (L ₁ , L ₂ ) 12 and a telephone is a telephone connection terminal (T ₁ ,
T ₂ ) 13 is connected. The line is connected to the telephone side during standby via line connection relay contacts 14 and 14 ',
The use state of the telephone or the incoming call from the line is monitored by the incoming call detection and telephone use detection unit 16, and its output side is connected to the control unit 24. The control unit 24 is the line connection relay 2
When the connection signal CML is output to 5, the relay operates, the contacts 14 and 14 'are switched, and the line is connected to the line connection portion 15
The call current loop from the station is connected to the call transformer 1
7 through the primary side. Call transformer 17-2
The next side is connected to a data transmission circuit 22 and a PB signal transmission section 23 during communication via a billing signal noise elimination filter 18 including capacitors 19 and 20 and a coil 21. The data transmission circuit 22 and the PB signal transmission section 23 are controlled by the control section 24.

Next, the operation of the above embodiment will be described. When the control unit 24 now detects the calling factor, it monitors the incoming signal (RI) and the telephone busy signal (OH) from the incoming call detection and telephone use detection section 16 for a certain period of time, and when neither is detected, the line connection relay 25 And outputs a connection signal (CML) to the contacts 14 and 14 'of the line connection relay 25 to the line connection unit 15 side. Next, the control unit 24 outputs a dial signal (DP) based on the dial type of the line registered in advance in the internal memory, sends a dial pulse to the line, and calls the other party. When the line type is PB, the PB signal transmission unit 23 outputs the PB dial signal to the line through the billing signal noise elimination filter 18, the call transformer 17, and the line connection unit 15 while the DP signal is on. After dialing, when the monitoring center side responds, if the telephone to be used is a pink telephone, the station sends out a billing signal for line polarity reversal at each time interval according to the call frequency.
The billing signal is generally a pulse having an AC component as a result of reversing the polarity of the line and returning it for several hundred ms. The main component is several Hz to several tens Hz, but the harmonic component is several hundred Hz. Also extends. On the other hand, during data communication, the modulated signal from the communication line via the data transmission circuit 22 is band-limited by the reception filter inside the data transmission circuit 22 to remove components other than the used frequency band, and the signal is demodulated to be received data by the control unit. To 24. Reference numeral 26 in FIG. 2 shows the frequency characteristic of the reception filter. However, since the reception filter of the data transmission circuit 22 is made into a chip and its characteristic is not a characteristic generally assuming that the above-mentioned charging signal pulse component is removed, the charging signal is transmitted as noise through the line connection unit 15. When applied to circuit 22, S at the output of the internal receive filter
The / N ratio cannot be secured, resulting in a data error. Therefore, in the present invention, the charging coil noise elimination filter (high-pass filter circuit) having the low-pass cut characteristic shown by 27 in FIG. 2 is provided in the secondary coil of the call transformer 17, the capacitors 19, 20 and the element of the coil 21. Configure and call it Transformer 1
7 is inserted between the data transmission circuit 22 and the data transmission circuit 22 to improve the S / N ratio as shown by 28 in FIG. 2 to prevent a data error at the time of data reception.

[0010]

As is apparent from the above-described embodiment, the present invention can eliminate the billing signal noise generated in the pink telephone line in the automatic teller machine, and the number of parts used in the filter circuit is only a few. It can be realized with a slight cost increase. Therefore, the adapter which was required in the past is no longer required, no extra work is required, and it is advantageous in terms of cost.

[Brief description of drawings]

FIG. 1 is a schematic electrical connection diagram showing the configuration of an automatic notification device on the terminal side in an embodiment of the present invention.

FIG. 2 is a characteristic diagram of a filter circuit used in an automatic notification device.

FIG. 3 is a block diagram showing the configuration of a conventional automatic notification system.

FIG. 4 is a block diagram showing the configuration on the terminal side when using a conventional pink telephone.

[Explanation of symbols]

12 line connection terminal 13 telephone connection terminal 15 line connection section 18 billing signal noise elimination filter (high-pass filter circuit) 22 data transmission circuit

Claims (1)

[Claims] 1. An automatic reporter having a network control function for automatically reporting information such as security information and meter-reading information generated in a dwelling unit to a remote monitoring center via a general subscriber telephone line, and a line connection unit and data transmission. An automatic notification device that has a high-pass filter circuit between the circuits so that data communication can be performed without being affected by billing signal noise even in the case of a pink telephone line.