JPS6159959A - Public utility type subscriber' equipment - Google Patents

Abstract

PURPOSE:To change easily each function by separating independently each function of a network interface section, a charge./connection control section and a subscriber' function section. CONSTITUTION:The network interface section I, the charge/connection control section II and the subscriber' function section III are constituted independently at each function and the network interface section is provided with a polarity inversion pulse absorbing pulse 23, a charging information generating function section 24 and terminals connected to public telephone lines L1, L2 through which a talking signal is transmitted from a station while being superimposed on a polarity inversion pulse. Further, the charge/connection control section 12 is provided with card/coin mechanisms 43, 44 and connection control mechanisms 46-50, and the subscriber' function section is equipped with a talking circuit 62. Then the network interface section and the charge/connection control section are coupled b a incoming line 34 transmitting the presence of a incoming call from a call signal detection section 21, talking lines 11, 12 and charge information lines 32, 33 having no superimposed polarity inversion pulse.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to a network interface unit that receives and converts polarity reversal pulses, and a charge processing 1 call control line 5 in a public telephone system using polarity reversal pulses. This relates to public-use in-home equipment in which the fee/connection control section and the in-home function section are separated.

For the sake of explanation below, examples will be taken of a public home appliance and an L°C public telephone.

[Prior art]

Conventionally, public telephones and pink telephones have a function of receiving a polarity reversal pulse, which is a charge collection signal sent from a telephone station, a function of controlling connection of two lines, and a function of processing charges using coins and cards, all integrated in the device. Therefore, when changing the network interface part 2 or changing the call service content, it becomes necessary to redesign the public telephone circuit χ.

one! In order to improve the sophistication of in-home functions and create a variety of new services, it is necessary for I/Cs to have independent network interfaces and establish a constant in-home function interface regardless of network function or transmission method. However, in the conventional public telephones and pink telephone circuits, there is no differentiation of functions on the node, so it is difficult to clarify the interface of the in-home function section. For example, when attempting to connect a facsimile machine instead of a telephone circuit, the charge/connection control section and network interface section were changed, and the entire public FF1 telephone circuit was reconfigured.

Furthermore, if the length of the polarity reversal pulse rL sent out by the station as a gold mining store name 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, and makes each function independent.The purpose of this invention is to: The purpose is to ensure that changes in each function do not affect the others. The present invention will be explained below with reference to the drawings.

[Embodiments of the invention]

The drawing shows one embodiment of the present invention, where ■ is a network interface section, and II is a charge/connection Arc m! I is the home function section, L, L2 is the public telephone line.

The network interface section I includes a calling signal detection section 21. which detects a calling signal on the telephone line 11, 12 degree analog switch 13 to 16.16 Hz. It includes a polarity detection section 22, a polarity inversion pulse absorption circuit 231, and a billing information generation function section 24. This billing information generator unit 24 includes a photodiode 25. Phototransistor 26. It consists of a toggle flip-flop 27, a resistor 28, a capacitor 29, etc. 30.3
1i resistor, 32, 33 is a billing information line, and 34 is an incoming line.

In addition, the fee/connection control unit (■) includes a DC supply circuit 41, a loop detection circuit 42, a card mechanism 43, a coin mechanism 44, a CP
U45, loop switch 46, DC termination section 47, CMO
It is composed of an S switch 48, a transformer 49, 50, etc., and is connected to a network interface section r through communication lines 11, 12, billing information lines 32, 33, and an incoming line 34.

Furthermore, the home function section I is comprised of a hook switch 61, a telephone call circuit 62, a tone ringer 63, and the like.

Next, when the K that operates this is turned off in the home function section ■, the hook switch 61 is turned on, and a loop current flows from the DC supply circuit 41VC in the charge/connection control section ■, so this r'L 'Detected by the Pt loop detection circuit 42. When the YCPU 45 detects insertion of a card into the card mechanism 43 or insertion of a coin into the coin mechanism 44,
Operate the loop switch 46 and connect the network interface section I.
Connect the IL flow terminal W4 to the communication line 11゜120 output terminal. χ
Connect.

In network interface section I, analog switch 1
3' and 15 are normally on, and 14.16 is normally off, so the connection between the public telephone line L1 terminal, the DC termination section 47 of the fee/connection control section ■, and the public telephone line L2 terminal is normally off. A DC loop is formed and no calls are made to the station.

Next, the CPU 45 switches the CMOS switch 4117. - Operate and create a redundant routine to the home function I, allowing dialing from the home function.

When the other party answers, there is no polarity change in the case of a free call, so it's a seven-way call! It becomes possible to make a phone call using the phone call circuit 62.

For paid calls, call the public phone number A71+iL when answering.
, to the (+) loop of the public tit line L2. Polarity detection unit 22? Detected, analog switch 13.1!1 is turned off, analog switch 14.16 is turned on, and polarity reversal pulse absorption circuit 23 is connected.

When the polarity reversal pulse absorption circuit 23 is connected, even if the polarity of the public telephone line, L, changes due to the diode bridge, the output of the network interface section I is always connected to the telephone line l1lJ1.
Direct current flows in the direction from 2 to 11. Public telephone line L due to polarity reversal during response or polarity reversal pulse during call
When the loop TfLH, flows from 2 to 2, the photodiode 2
5 lights up, the phototransistor 26 is turned on by this γLK, the point A becomes the G level, and the point B becomes the no-repel level.

With the amplifier edge operation toggle 7 lip front knob 27, the 0 point becomes NOI when the B point becomes -irrepel.
When point B is next... Charge information lines 32.33 are connected to resistors 1328. when the 0 point becomes high level or low level. A pulse having a pulse width determined by the integrating circuit formed by the capacitor 29 is sent out fL. Is it worth paying 15 for the first time? News line 32
．． In 33, immediately after the transfer pulse length is transferred regardless of the VC, billing information with a constant pulse width is sent out. However, during a call, there is always a loop ffl flow in the direction from #6 #12 to #11, regardless of the transmission pulse from the station. It will flow.

Regarding the incoming call, the calling signal χ is detected by the calling signal detection unit 21, and the secret wire 34 is set to high level and is sent to the CPO 45.
Is it Ai Shinko? inform.

The CPU 45 sends a ringing command Z to the tone ringer 63, and when the tone ringer 63 hears this and goes off-hook, the hook switch 61
When the loop current generated by the DC supply circuit 41Vc is detected by the loop sensing circuit 42, the loop switch 46 is operated to connect the DC terminal 47χ and cause a ring trip. The ringing signal stops and CMO
Operate the S switch to make it possible to make a call.

Resistor 30.31 is for Lou/TvL current limiting, and transformer 49.50 is a DC blocking transformer.

The above description is based on the case where the in-home PC has only the telephone communication circuit 62, but the same applies even if it is replaced with a telephone circuit for public use such as a facsimile machine.

In addition, the charge/connection control section ■ and the in-home function section ■ are integrated.
Even if it closes, the above actions and effects will not be affected.

〔Effect of the invention〕

As explained above, 5VC1 This invention separates the network interface section, charge/connection control section, and in-home function section, and also includes a polarization pulse absorption circuit, a billing information generation function section, and a call signal in the network interface section. Equipped with a detection section, a communication line between the network interface section and the rate/connection control section in which polarity reversal pulses are not superimposed, and billing information that does not reflect polarity reversal pulse waveforms. Since the billing information line that transmits the information is connected to the incoming line that notifies the incoming call, the in-home function section can be configured independently of the line control function and charge control function, and the charge/connection control function can be configured independently. The section controls only the information transmitted by the call winner,
The billing information line is transmitted under predetermined conditions, and the incoming call line is transmitted under predetermined conditions.Receiving whether there is an incoming call (line 2) It has the advantage that it does not affect the electrophysical conditions between the two sides. It was,
Even the interface conditions with the network interface unit and the rate/connection control unit can be changed without changing NLT engineering, modifications or advances in the station or transmission system, and its functions.

Composition y! l - can be changed a thousand times. In this way, the craftsmanship, net side, and home side can develop independently from each other. Furthermore, since the calling signal is a high-level signal of IUOV (pp) at 16Hz, if you connect it to the in-house function section via this charge, the cost will only go up to the amplifier in terms of withstand voltage. Since there is no ML, there is an advantage that the problem 9d above is solved.

[Brief explanation of drawings]

! Ima home 4 table 11 Hi section, L, L2 is a public telephone line,
11゜: 17f'yo J [El F activity +ffj-13+
1 4+ 1 5, 1 stt Analog signal detection unit, 21 is a ringing signal detection unit, 22 is a polarity detection unit, 23
2 is a polarity reversal pulse absorption circuit, 24 is a billing information generation function unit, and 2
5 is a photodiode, 26 is a phototransistor, 27 is a toggle flip 7p tube, 28, 30.31 is a resistor,
29 is a capacitor, 32.33 is a billing information line, 34 is an incoming line, 41 is a DC supply circuit, 42 is a loop detection circuit, 4
Bit power mechanism, 44 is a coin machine, 45 is a CPU, 4
6 is the loop inch, 47 is the DC terminal, 48 is 0 MO
8 switch, 49.50 is a transformer, 61 is a hook switch, 62 is a communication circuit, and 63 is a tone ringer.

Claims (1)

[Claims] It has a polarity reversal pulse absorption circuit, a billing information generation function section, and a ringing signal detection section, and a network interface section that is connected to a public telephone line from which a call signal with a polarity reversal pulse superimposed on it is transmitted from the station, and a card or It consists of a fee/connection control unit that processes coin fees and controls the connection of the communication circuit, and an in-home function unit that is connected to this fee/connection control unit and sends and receives signals to and from the station, and the network interface unit and the charge/connection control section are connected by a communication line on which no polarity inversion pulse is superimposed, a billing information line for transmitting the billing information, and an incoming call line for transmitting whether or not there is an incoming call from the calling signal detection section. Publicly available in-home equipment characterized by: