JPH06291887A - Digital public telephone set - Google Patents

Abstract

PURPOSE:To attain call from a digital terminal to a digital charge line by adding charge stop information to call information, and transmitting it to the digital charge line at the time of receiving the call information from the digital terminal housed in a digital public telephone set. CONSTITUTION:At the time of receiving the call information from a digital terminal 2 connected with an S point connector 25, a CPU 10 executes a call protocol by an I interface line control part 21. Also, at the time of receiving the call information from an analog terminal 3, the CPU 10 operates the similar processing. At that time, the CPU 10 adds the charge stop information of the call information from the digital terminal 2 or the call information from the analog terminal 3, prepares a call message, and transmits it to an ISDN network. Thus, the charge information can not be transmitted from the ISDN network side, and speech through the digital terminal 2 or the analog terminal 3 can not be charged.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital public telephone used in a store-house and the like.

[0002]

2. Description of the Related Art Conventionally, in a house with stores, an analog telephone line, which is a billing line, is laid to provide a call service to customers who visit the store, and a pink public telephone is connected to this billing line. . On the other hand, in recent years, ISDN networks capable of providing various services have been expanded, and digital telephones connected to the ISDN networks have become widespread. Due to such expansion of the ISDN network, a proposal has been made to lay a digital billing line for the above-mentioned store-houses, etc., and along with this, a digital pink public telephone is being developed.

[0003]

However, even if a digital terminal such as the above-mentioned digital telephone connectable to a general ISDN line is accommodated in such a digital pink public telephone to make a call, the digital pink public telephone is connected to the digital pink public telephone. Since the ISDN line to be used is a billing line, there is a problem that a call cannot be made directly from the digital terminal.

Therefore, it is an object of the present invention to make a call to a digital billing line from a digital terminal accommodated when the digital pink public telephone accommodates the digital terminal.

[0005]

In order to solve such a problem, the present invention, when receiving calling information from a terminal, adds charging stop information to this calling information and transmits it to a digital charging line. The means is provided in a digital public telephone.

[0006]

When the calling information from the digital terminal is received, the charging stop information is added to this calling information and the calling information is transmitted to the digital charging line. As a result, the charging information can be prevented from being returned from the ISDN network, so that the digital terminal can make a call to the digital charging line.

[0007]

The present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of a digital public telephone according to the present invention, and shows an example of a digital pink public telephone (hereinafter referred to as pink telephone) installed in a store-combined house or the like. In the figure, 1 is a pink telephone connected to an ISDN digital billing line (hereinafter referred to as line) L, 2 is a digital terminal such as a digital telephone accommodated in a pink telephone 1 and can be directly connected to an ISDN line, 3 is a pink telephone 1 Is an analog terminal such as an analog telephone housed in the same manner.

Here, the pink telephone 1 is constructed as follows. That is, 10 is a CPU that controls the pink telephone 1 as a whole, 11 is a ROM that stores programs executed by the CPU 1, 12 is a RAM that stores data, 13 is an operation unit such as dial keys, and 14 is I / O unit for transmitting operation information of the operation unit 13 to the CPU 10, 1
Reference numeral 5 is a display device for performing various displays, 16 is an LCD controller for controlling the display of the display device 15, 17 is a coin processing unit for processing inserted coins, and 18 is a processing for an inserted telephone card or the like. A card processing unit 19 is a controller that controls the coin processing unit 17 and the card processing unit 18.

Reference numeral 20 is a clock circuit for generating a clock signal, and this clock signal is supplied to the CPU 10 and an I interface line controller 21 described later. I
The interface line control unit 21 performs a communication protocol with the ISDN network via the line L under the control of the CPU 10. Reference numeral 22 denotes an I / O unit, which supplies a B channel audio signal or the like from the line L via the I interface line control unit 21 to an I interface line control unit 23 and a call circuit 24, which will be described later, and also an I interface line control unit 23 and The B channel transmission signal and the like from the communication circuit 24 are transmitted to the line L. Reference numeral 23 denotes an I interface line control unit which uses a protocol for controlling incoming and outgoing calls for the digital terminal 2 and the analog terminal 3 respectively connected to the S-point connector 25 and the analog interface unit 26 so that they can be used as they are.
It is executed under the control of 10. Reference numeral 27 is a parallel I / O unit that detects the connection of the digital terminal 2 connected to the S-point connector 25, and 28 is the pink telephone 1
Is a power supply unit that supplies power to each unit.

When power is supplied from the power supply unit 28 and the CPU 10 is activated, the CPU 10 starts monitoring dial operation information of the operation unit 13 and call information from the accommodated digital terminals 2 and analog terminals 3. . Then, the I / O unit 14
When the dial information from the operation unit 13 is detected via the, the amount information of the coin inserted into the coin processing unit 17 or the residual number information of the card inserted into the card processing unit 18 is input via the controller 19, If there is such frequency information, the I interface line control unit 21 is caused to perform a calling protocol for transmitting the dial information to the ISDN network via the line L. When the other party's response is detected, the line L → I interface line controller 21 → I
A call path is formed with the other party via the B channel on the path of the / O unit 22 → call circuit 24, and a call is made with the other party. In this case, the CPU 10 uses the I interface line control unit 2 to collect the charging information that comes through the line L during a call.
When received through 1, the coins stored in the coin processing unit 17 are stored or the frequency of the card inserted in the card processing unit 18 is subtracted.

When the CPU 10 receives the call information from the digital terminal 2 connected to the S-point connector 25 via the I interface line controller 23, the CPU 10 similarly receives the I information.
The interface line controller 21 executes the calling protocol. And when the other party's response is detected,
Call path between the digital terminal 2 and the other party via the S point connector 25 via the B channel on each path of the line L → I interface line control unit 21 → I / O unit 22 → I interface line control unit 23 To form. The same is true when calling information is received from the analog terminal 3 connected to the analog interface unit 26, and in this case also, the analog terminal 3 is connected to the analog terminal 3 via the B channel on the above path. Form a call path to the other party.

In this case, the CPU 10 adds the charge stop information to the calling information from the digital terminal 2 or the calling information from the analog terminal 3 via the I interface line control unit 23 to create a call setting message to generate the I interface. In order to transmit from the line control unit 21 to the ISDN network,
No billing information is transmitted from the ISDN network side, and therefore, it is possible to prevent billing for a call via the digital terminal 2 or the analog terminal 3.

FIG. 2 is a sequence diagram showing an operation of the pink telephone 1 which receives the calling information from the digital terminal 2 or the analog terminal 3 and transmits the charging stop information to the ISDN network side which is the ISDN exchange. is there. First, FIG.
The operation when the call information is received from the digital terminal 2 shown in (a) will be described. That is, when the digital terminal 2 makes a call via the pink telephone 1, the pink telephone 1 transmits a call setting message indicating call information to the pink telephone 1. On the other hand, when the pink telephone 1 receives the call setup message which is the call origination information from the digital terminal 2, it creates a call setup message in which the charge stop information is added to this call origination information and sends it to the ISDN exchange through the line L. Send. Then, the IS is sent to this transmitted call setup message.
When a reception message indicating that the call is permitted is received from the DN switch side, the pink telephone 1 receives the reception message and transmits the reception message to the digital terminal 2 for permitting the call, and the line L → I interface line control unit 21. → I / O part 2
2 → I interface line controller 23 → S point connector 25 → Forms a call path of the digital terminal 2. As a result, a call is started with the other party via the digital terminal 2.

Next, the operation of the pink telephone 1 when receiving the calling information from the analog terminal 3 will be described based on the sequence diagram of FIG. 2 (b). When making a call via the pink telephone 1, the analog terminal 3 first forms an off-hook loop. Then, a dial tone is sent to the analog terminal 3 via the analog interface unit 26 in the pink telephone 1. Then, the dial operation is performed on the analog terminal 3 side and the dial signal is pink.
Then, the pink telephone 1 side receives this dial signal, and at the time when the specified number of digits is received, this is used as call information, and a call setup message is created by adding billing stop information to this call information. And send it to the ISDN exchange. Then, when the ISDN exchange side receives a reception message indicating that the call is permitted in response to the transmitted call setup message,
The pink telephone 1 forms a call path of line L → I interface line control unit 21 → I / O unit 22 → I interface line control unit 23 → analog interface unit 26 → analog terminal 3, and as a result, via the analog terminal 3. A call is started with the other party.

As described above, when the pink telephone 1 connected to the line L which is the digital charging line of ISDN accommodates the digital terminal 2 or the analog terminal 3 and each terminal makes a call, the pink telephone 1 side By adding the charging stop information to the calling information and transmitting it to the ISDN network, it is possible to prevent the charging information from being returned from the ISDN network, so that each terminal can make a call, while the pink telephone 1 makes a call. The billing information is transmitted from the ISDN network for the call in this case. A person in a store-combined house can make a normal call using the digital terminal 2 connected to a general ISDN line or the analog terminal connected to an analog line. The telephone 1 can be used to make a call using a coin or a card. Further, it is possible to directly connect the pink telephone 1 without modifying the digital terminal 2 and the analog terminal 3.

[0016]

As described above, according to the present invention, when the calling information from the digital terminal accommodated in the digital public telephone is received, the charging stop information is added to the calling information to the digital charging line. Since the transmission is performed, there is an effect that the accommodated digital terminal can make a call to the digital charging line.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a digital public telephone according to the present invention.

FIG. 2 is a sequence diagram showing an operation of the digital public telephone.

[Explanation of symbols]

 1 Digital Pink Public Telephone 2 Digital Terminal 3 Analog Terminal 10 CPU 21, 23 I Interface Line Control Section 22 I / O Section 25 S Point Connector 26 Analog Interface Section 27 Parallel I / O Section L Digital Billing Line

Front page continuation (72) Inventor Hironobu Hara 1-1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Nihon Telegraph and Telephone Corporation

Claims (1)

[Claims] 1. A digital public telephone that accommodates a terminal that cannot be connected to a digital billing line, and means for adding billing stop information to the calling information when the call information is received from the terminal and transmitting it to the digital billing line. A digital public telephone equipped with.