JPS6159958A - Public utility type subscriber' equipment - Google Patents

Abstract

PURPOSE:To attain ease of change in each function by separating independenly functions of a network interface section, a charge/connection control section and a subscriber' function section. CONSTITUTION:The network interface section 10, the charge/connection control section 20 and the subscriber' function section 30 are constituted independently by each function. The network interface section is provided with terminals 43, 44 which are connected to public telephone lines 41, 42 through which a talking signal from a polarity inverting pulse absorbing circuit 10A, a charging information generating function section 10B and a station is transmitted while being superimposed with a polarity inversion pulse. Then the charge/connection control section 20 is equipped wit card/coin mechanisms 21, 22 and a connection relay 25, the subscriber' function 30 is provided with a talking circuit 31 or a facsimile terminal equipment and receives a signal eliminated with the polarity inversion pulse from a public telephone line.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention utilizes a network interface unit that receives and converts polarity reversal pulses and a charge processing unit in a public telephone system using polarity reversal pulses. This relates to public-use in-home equipment that is separated into a fee/connection control section and an in-home function section. For convenience of explanation, a public telephone will be taken as an example of a public home device.

[Prior art]

Conventionally, public telephones and pink telephones have integrated the functions of receiving a polarity reversal pulse, which is a charge collection signal sent from a station, a single-line connection control function, and a function of processing charges using coins and cards. , Changes in the network interface section 5 Changes in call service content, etc. required a new redesign of the public telephone circuit.

In addition, in order to improve the sophistication of the home function section and create various new services, it is necessary to make the network interface section independent and establish a constant home function section interface regardless of the network position and transmission capacity. In the conventional public communication circuits and pink electric wire machine circuits, the functions are not differentiated on the hardware, so it has been difficult to clearly define the interface of the in-home function section.

For this reason, when attempting to connect a facsimile instead of a telephone call circuit as an in-home function section, for example, it was necessary to change the fee/connection control section and the network interface section and reconfigure the entire public telephone circuit.

Furthermore, if the length of the polarity reversal pulse sent as a billing signal from the station changes, it may become necessary to redesign and remanufacture the entire public telephone.

[Summary of the invention]

In order to solve these drawbacks, this invention clarifies the interfaces of the network interface section, charge/connection control section, and home function section, making each function independent.The purpose of this invention is to make each function independent. To prevent changes in functions from affecting others.This invention will be described below with reference to the drawings.

[Implementation sequence of the invention]

Figure 1 shows one of the benefits of this invention! iu, 10 is a network interface section, 20 is a charge/connection tljlJ control section,
30 is an in-home function unit, and 41 and 42 are public telephone lines.

Network I y p 7 x--X @ 10 kt,, communication line 11. 12° detection relay 13. Response relay 14. It consists of 10 polarity reversal pulse absorption circuits, 2 billing information generation function parts 10B, and the 10 polarity reversal pulse absorption circuits further include capacitors 15. Relay 16. Consists of 17 thyristors, and
The charging alarm '4 generating function section 10B consists of a reed relay 18, a contact 16a of the relay 16, and the like.

In addition, each relay 13, 14, 16. reed relay 1
Contacts such as 8 are suffixed with suffixes a, b, c, etc., for example 13a.

The fee/connection control unit 20 controls the card mechanism 21. Coin mechanism 2
2. CPU23. Relay 4 operating circuit 24° connection relay 25. Loop monitoring unit 262, incoming call detection unit 27, billing information f
It consists of f128.29 etc.

Furthermore, the in-home function unit 30 has a trace number 't831°, a seven-way switch 32. Bell 33. It consists of terminals 34, 35, etc.

Further, public '1if and telephone lines 41 and 42 are connected to terminals 43 and 44, respectively.

Next, the operation will be explained. When making a call using the call circuit 31 of the home function section 30, the hook switch 32 will meter the phone when you go off-hook.◎If you insert a card or coin into the card mechanism 21 or coin mechanism 22 in the fee/connection control section 20, The CPU 23 detects this, and if it is normal, the relay drive circuit 24 connects the relay 2.
5 is operated, and the in-home function section 3 is connected to the
0 terminals 34 and 35 are connected to the communication lines 11 and 12 of the network interface section 100.

Initially, the network interface s1a is in a state as shown in FIG.
is conductive through the coil of the detection relay 13 for detecting the station line loop, while the communication line 12 is connected to each contact 13 al
l 4 Go 14 b through the public 1! It is electrically connected to the terminal 44 of the speech line 42.

Shikatsu [, as mentioned above, go off-hook and connect to the home function unit 3.
When the terminals 34 and 35 of G form a loop and a card or coin is inserted, the fee/connection control section 30 connects the telephone line 11
4 terminals 34 and 4 terminals 35 from the communication line 12,
As a result, communication lines 11 and 12 form a loop. Therefore, between the terminals 43 and 44, the main load is the coil resistance of the detection relay 13 and the telephone call circuit 31, which forms a (+) loop of the public telephone line 41 with the station and makes a call to the station.

The loop current from the station flows from terminal 43 to terminal 44, operating detection relay 13 and breaking contact 13a. When the other party answers, since there is no polarity change in the case of a free call, current flows through the call circuit 31 and the call becomes possible. In this case, the station does not send out a polarity reversal pulse as a billing signal. In the case of a paid call, the polarity is reversed when the other party answers, and the terminal 4
A loop current flows from terminal 4 to terminal 43, and since contact 13a of detection relay 13, which is in slow operation, is still broken, response relay 14 operates, and contact 14a.

14b switches, and contact 14c breaks.

Further, the slow recovery detection relay 13 recovers thereafter.

When the contacts 14a and 14b operate, the 10 polarity reversal pulse absorption circuits are connected, and the terminal 43 of the public telephone line 41 is connected to the terminal 43 of the public telephone line 41.
Even if the polarity of the terminal 44 changes, a loop current always flows from the contact 14b to the communication line 12 and from the communication line 11 to the contact 14a. Further, the impact noise of the polarity reversal 1c#5 is smoothed by the equal pressure of the capacitor 15. The ninja relay 14 continues to operate until the call ends and the loop is broken.

After a response from the other party, when a polarity reversal pulse (No. 8) arrives from the station, the relay 16 for receiving the polarity reversal pulse operates, and at the same time, the reed relay 18 of the charging information generation function unit 10B operates, and the contact 18a is connected to the meter. Then, the communication line 1L12 and the separately provided charging information lines 28 and 29 are short-circuited.When the relay 16 operates and the contact 16a breaks, the reed relay 18 is restored, and the contact 18a is restored and the charging information line 2
It will be open between 8°29. The ON time of this contact 18a is determined by the operating time of the reed relay 18, etc., and is unrelated to the time during which the polarity is reversed. The operation of contact 17a causes thyristor 17 to operate, and relay 16 continues to operate.

The CPU 23 in the charge/connection control unit 20 connects the charge information line 2
When 8.29 is short-circuited, the station learns that a charge signal has been sent from the station, and performs charge collection processing using the card mechanism 21 or coin machine [22].

When the charge is insufficient, the follower relay 25 is restored and the contact 25
a and 25 b to disconnect the home function unit 30 from the public i-talk lines 41 and 42, and disconnect the (+) loop of the public telephone line 42. In addition, when the on-hook occurs in the in-home function section 30, the loop becomes kasuri by the hook switch 32, which is detected by the loop monitoring section 26, and the
PU23 is the card mechanism 21. The coin mechanism 22 and the like are restored.

For incoming calls, the incoming call detection unit 27 detects a 16 Hz ringing signal,
The CPU 23 operates the connection relay 25 and connects the in-home function section 3.
0 is connected to iK to enable the bell 33 to ring. If you go off-hook, the telephone circuit 31 is a public telephone line 41.42I.
C connection and you can talk. When receiving a call, use public telephone line 4.
Since 16 Hz is superimposed on the (+) loop of 2, the detection relays 1 and 3 do not operate, and therefore the response relay 14, which is short-circuited by the contact 13a, does not operate.

In addition, although the case where the in-home function part 3G has a telephone call function has been described above, it is possible to control other public use types, such as a 7-actumeter, with a similar configuration. In addition, fees and
Even if the connection control section 20 and the in-home function section 30 are integrated, the above operations and effects will not be affected.

FIG. 2 shows another embodiment of the present invention, in which noise that cannot be removed by the lF=polar pulse absorption circuit 10A is removed from the communication line 11.1.
In this configuration, a band-pass or low-pass filter 50 is added to pass only one communication band to prevent the signal from being superimposed on the second communication band. The impulsive noise at the time of polarity reversal includes quite high frequency components, and the polarity reversal pulse absorption circuit 10A shown in Fig. 1 does not particularly interfere with telephone calls, but the singing frequency that causes problems with facsimiles, etc. noise or very low frequency noise,
In other words, the DC level is transmitted directly to the telephone line.

However, these high-frequency or low-frequency noises are removed by the filter 50 in FIG. Never. Furthermore, even when loop current is monitored within the facsimile 36, there is no fear that DC level fluctuations will have an adverse effect.

〔Effect of the invention〕

As explained above, in this invention, the network interface section, charge/connection control section, and home function section are separated, and the charge/connection control section is provided with a billing information line separate from the call line.
In addition to eliminating the direct influence of the turning point pulse, it is also possible to eliminate the echoes of the turning point by using a turning pulse absorption circuit on the communication line. Therefore, the charge/connection control unit and the in-home function unit can use the telephone line in the same way as a general subscriber telephone line, and moreover, the billing signal sent from the station for each unit of time can be used independently of the above-mentioned call interruption. can be received.

'f, Even if it becomes necessary to change the shape of the polarity reversal pulse, for example by lengthening the polarity reversal time, due to circumstances of the station or subscriber line, the communication line and billing information can be changed by simply changing the network interface i. Since the line interface can be configured so as not to be changed, the network interface side and the home function m side can be developed independently of each other.

Furthermore, the network interface section has an extremely simple configuration and has advantages such as being able to operate using only local power supply.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram showing one embodiment of the invention, and FIG. 2 is a circuit diagram showing another embodiment of the invention. In the figure, 10 is a network interface section, 10 is a polarity reversal pulse absorption circuit, IOB is a billing information generation function section, 11.12+
X) ji communication line, 13 is a detection relay, 13a is a contact, 14
is a response relay, 14a, 14b, 14c are contacts,
15 is a capacitor, 16 is a relay, and 16a. 16b is a contact, 17 is a thyristor, 18 is a reed relay, 18a is a contact, 20 is a fee/connection control unit, 21 is a card mechanism, 22 is a coin mechanism, 23 is an OFU, 24 is a relay drive circuit, 25 is a connection relay, 25a and 25b are contacts,
26 is a loop monitoring section, 2T is a layer x detection section, 28, 24
3 is the billing information gland, 30 is the wall inside the house, 31 is the call circuit,
32 is a hook switch, 33 is a bell, 34, 35, 43
, 44 is a terminal, 36 is a facsimile j! +, 41.42 are public telephone lines, and 50 is a filter.

Claims (1)

[Claims] It has a polarization pulse absorption circuit and a billing information generation function section,
a network interface unit connected to a public telephone line from which a polarization pulse is superimposed on a call signal and transmitted from the station; a charge/connection control unit that processes charges using cards and coins and controls connection of the call circuit; and an in-home function section that sends and receives signals between the network interface section and the charge/connection control section, and transmits information from the telephone line on which polarity reversal pulses are not superimposed and the billing information generation function section. Publicly available in-home equipment, characterized in that it is connected to a billing information line.