JPH01264355A - Public telephone equipment with data communication function - Google Patents

Abstract

PURPOSE:To perform data communication only by connecting a personal computer by assembling a network controller to perform the data communication in a public telephone system. CONSTITUTION:A network control part(network controller)4 provided for data communication is constituted of a modem MD, a control circuit CNT capable of performing the interpretation and the execution of a command for network control sent from the personal computer(data terminal equipment)PC and the relay of information being transferred between a called party terminal via the modem MD to the personal computer PC, etc., the relays HS and DI of a network control circuit operated at the time of controlling a network and their contacts hs and di, and a connector having a universal interface for the data communication. The control circuit CNT of the network control part 4 for data communication and the personal computer(data terminal equipment)PC are connected via a connector RS for universal interface and a universal interface cable 5 at both ends. Thus, only by connecting the data terminal equipment such as the personal computer, etc., the data communication can be performed at high speed from the public telephone system.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is applicable to a public telephone device with a data communication function, and in particular realizes a public telephone device having a versatile data communication interface and a fee collection function. The present invention relates to a public telephone device with a data communication function suitable for user convenience.

[Conventional technology]

Public telephones that can make conventional calls and charge collection are discussed, for example, in "600 Type Special Simple Public Telephones" published by the Telecommunications Association of Japan, March 30, 1970, pages 10 to 17. However, no means for data communication is provided.

For this reason, users have conventionally connected a so-called acoustic coupler and a data communication terminal to the handset of a public telephone to perform data communication.

FIG. 2 is a block diagram showing a connection example when data communication is performed using a conventional public telephone. In Figure 2,
The dial section 1 of the conventional public telephone PT is composed of a hook switch H5 that closes a DC loop to the network and a dial contact DI that connects and disconnects the DC loop according to the dial number dialed by the user. Perform the action. The toll collection unit 1 is composed of a relay M that responds to a toll collection signal sent from the network, and for example, a 10 yen coin is collected each time the relay M operates once. The communication section 3 consists of a communication circuit section NW and a handset TR. acoustic coupler ac
consists of a modem MD and a handset TR.

The handset TR of the public telephone PT and the handset TR of the acoustic coupler AC are coupled so that signals within the voice band can be transmitted and received via sound. The modem MD of the acoustic coupler AC and a data communication terminal, such as a laptop-shaped personal computer PC, are connected via a cable 5 to general-purpose interface connectors RE at both ends.

With the above configuration, when performing data communication, when the user picks up the handset TR of the public telephone PR and dials in a well-known manner, the dial section 1 operates and the terminal L1. The network operates through a line connected to L2 to connect to the other party's terminal. The user then learns that the other party's terminal has responded by, for example, listening to the carrier tone of the modem sent from the other party's terminal, and couples the handset TR of the public telephone PT with the handset TR of the acoustic coupler AC. This connects the personal computer PC and the other party's terminal, allowing the user to perform data communication using a well-known method. At the same time, the charge collection unit 2 receives the charge collection signal sent from the network during the data communication. Relay M operates and a 10 yen fee corresponding to the communication fee is collected.

[Problem to be solved by the invention]

In the above-mentioned conventional technology, since public telephone equipment does not have a data communication function, users have conventionally connected an acoustic coupler and a data communication terminal, such as a laptop-shaped personal computer, to the handset of the public telephone to perform data communication. However, there were problems such as the need for the user to carry the acoustic coupler and batteries for the acoustic coupler.

The purpose of the present invention is to add a data communication function to the functions of conventional public telephones, thereby making it possible to perform data communication simply by connecting a data communication terminal, such as a personal computer, and to reduce charges according to the degree of network usage. To provide a public telephone device with a data communication function that allows payment to be made with coins or telephone cards or IC cards in place of coins.

[Means to solve the problem]

The above purpose is to incorporate a network control device for data communication into a conventional public telephone device, and to connect the network control circuit of the network control device provided for data communication with the network control circuit of the public telephone device from either side. Connect to 5 and you can control
On the other hand, the modulation/demodulation circuit (modem) of the network control device installed to perform data communication with the telephone communication circuit of the public telephone equipment is designed to prevent sound (noise) from the transmission circuit of the public telephone equipment from going around to the modulation/demodulation circuit. This is achieved by a public telephone device with a data communication function that is configured to connect to 5-5, perform data communication, and collect charges even during the data communication, and is used as a data terminal such as a personal combinator. The network control device has a highly versatile data communication interface such as CCITT Recommendation V,
A well-known network control device that supports a physical interface compliant with 2B, V, 24 and an automatic dialing procedure compliant with V, 25biz, or a physical interface manufactured by Hayes (E!A Recommendation R5252C) and Hayes Network control equipment with established procedures (e.g. 5tn
Art Modem 1200) can be incorporated into conventional public telephone equipment by applying its functions and the like.

[Effect]

The above-mentioned public telephone device with a data communication function has functions necessary for making and receiving calls on the network (for example, creating a DC loop, detecting a dial tone,
dial, bell signal detection means) are connected in parallel with similar circuits in conventional public telephones so that they can operate from either one, and functions necessary for data communication (for example, a modem) are connected in parallel to the same type of circuit in conventional public telephones. By switching to 5 and connecting so that signals from the line can be transmitted and received without the sound of the speaker leaking in, transmitting to the network according to the instructions of the data terminal device (for example, a personal computer) connected to the network control device, While performing data communication with the other party's terminal by dialing and going through procedures such as answering the other party, it is possible to collect charges according to the degree of use of the network using the charge collection function of conventional public telephones.

〔Example〕

An embodiment of the present invention will be described below with reference to FIG.

FIG. 1 is a block diagram showing an embodiment of a public telephone device with a data communication function according to the present invention. In Figure 1, PT
is a public telephone device having all the functions of a conventional public telephone, in which 1 is a dialing section of a network control circuit consisting of a hook switch H5 and a dialing contact DI, 2 is a toll collection section consisting of a relay M, and 3 is a Telephone circuit NW and handset T
This is a communication section consisting of R. Public telephone equipment pr is terminal L1
．． It is accommodated in the communication network via a line connected to L2, is used for normal telephone communication, and has a toll collection function. Reference numeral 4 denotes a network control unit (network control device) provided for data communication.
A well-known network control device that supports an automatic dialing procedure based on IT or a network control device that has a procedure established by Hayes Corporation of the United States (for example, Sn+artModern 120
0) can be incorporated, and a modem (modulation/demodulation circuit) M
D and a personal computer (data terminal device) pc
A personal computer PC that interprets and executes commands for controlling the network sent from the PC (for example, commands compliant with the network control device manufactured by Hayes Corporation mentioned above) and sends and receives information to and from the other party's terminal via the modem MD. A control circuit (control unit) cyr that can relay data to the network, relays H5 and DI of the network control circuit that operate when controlling the network, and their contacts kl.

system and a general-purpose interface for data communication (e.g. EI
It consists of a connector R5 having a physical interface (physical interface compliant with A specification rRs252cJ). In the connection between the conventional public telephone device pr and the network control unit 4 for data communication, the dial unit 1 of the network control circuit of the public telephone device pr
The relays H5 and DI of the network control circuit necessary to control the network of the network control unit 4 and their contacts hp and di are the leads 10.
The communication circuit unit MW of the communication unit 3 of one public telephone device pr is connected so that the network can be controlled from either side via the
The modem MD is mainly necessary for exchanging information with the other party's terminal.The sound (noise) from the talking section (transmission circuit) 3 of the public telephone device pr is routed to the modem MD via the lead 11 and the contact hp. Not connected to 5. The network control unit 40 control circuit CRT for data communication and the personal computer (data terminal device) PC are connected via a general-purpose interface connector R5 and a general-purpose interface cable 5 at both ends.

With the above configuration, when a call is received from the Vertuna computer PC to the other party's terminal for data communication, a command for calling the other party's terminal from the personal computer PC (for example, FAT 0458811221C/B J) is used.
When sent to the path of personal computer PC-connector R5-cable 5-connector R5-control unit CNT, control unit CNT operates relay H5, so terminal L1
The path - lead 10 - contact AJI - contact cLi - lead 10 is closed and the network is activated via the line in a known manner. It also learns in a well-known manner that the network is ready to receive dialing signals, and returns the dialed number (e.g. r 04
58811221 J), the relay DI is connected and disconnected a number of times determined in accordance with 58811221J), so the contact di is disconnected and this disconnection signal is sent to the network. By counting these intermittent signals, the network determines that the dialed number is 1'-0458811221.
4, and calls the other party's terminal corresponding to the dialed number. When the other terminal responds in a well-known manner, the carrier signal sent by the other terminal is transmitted to the line terminal L.
1-contact II-contact d1-modem MD-contact ha1-terminal-2-line, modem MD detects this carrier signal and transmits it to control circuit CRT. The control circuit CRT thereby knows that the connection with the other terminal is completed, and the control circuit CRT-connector R5-cable 5-
A command indicating that a communication path has been established to the personal computer PC via the route of the connector R5-personal computer PC (for example, "r coyxzcr C/R")
Send out. The personal computer PC receives the command, performs data communication, and prepares for 5.

Thereafter, data communication is carried out using a well-known method, and during this data communication, a charge collection signal sent from the network activates the relay M of the charge collection section 2 to collect charges. There are two cases in which the data communication ends and the communication channel is restored. First, when the other party's terminal disconnects from the network, the carrier signal from the modem disappears, so the control circuit CNT learns of this and sends a command (for example, "CARRIEROFFC/R") to the personal computer pc. When the personal computer PC recognizes the command, it issues a command to disconnect the line (for example, "
Arrro C/RJ) is returned, so the control circuit CNT
After receiving this, it disconnects the network by restoring relay H5. Another case is when the personal combinator PC forcibly sends a command (for example, "ATHOC/R") to disconnect the line to the control circuit CNT, and the network is disconnected in the same way as in the previous case. be done.

〔Effect of the invention〕

According to the present invention, by simply connecting a data terminal device such as a personal computer, data communication can be performed from a public telephone device without using an acoustic coupler, and the data signal can be transmitted without using an acoustic coupler. Since there is no need to convert to carrier tone, high-speed data communication is generally possible.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of a public telephone device with a data communication function according to the present invention, and FIG. 2 is a block diagram showing a connection example in five cases in which data communication is performed using a conventional public telephone. . pr・・・・・・・・・Public telephone 1 ・・・・
・・・・・・・・・・・・Dial part 2・・・・・・・・・
・・・・・・Fee collection department 3・・・・・・・・・・・・
...Telephone section 4...Network control section MD...Modem CNT...Control circuit H5, DI... Rerail z, di... Relay contact R5... General-purpose interface connector 5...・・・・General purpose interface cable PC・・・・・Personal computer agent Patent attorney Katsuo Ogawa

Claims (1)

[Claims] 1. The network control circuit of a public telephone device accommodated in a communication network and normally used for telephone communication and having a charge collection function, and the network control circuit of a network control device provided for data communication. The communication circuit of the public telephone device and the modulation/demodulation circuit of the network control device provided for performing the data communication are connected in parallel so that the network can be controlled even from the public telephone device. By switching the connection so that it does not go around to the modulation/demodulation circuit,
1. A public telephone device with a data communication function, characterized in that it is configured to be able to perform data communication and to collect charges even during the data communication.