KR950000292B1 - Line matching device for communication processing system - Google Patents

Abstract

In the information searching terminal for communication processing system, the circuit adapting equipment provides the analogue subscriber with the method using adapter, subscriber line and modem for telephone line interfacing and connects the subscriber to line input signal. The equipment consists of a switch (11), a subscriber line (12), a model (13) and a host computer (14). The switch consists of a digital trunk adapter (111), a signaling service block (112), a subscriber control processor (113), an analogue subscriber an adapter (114), a ring generator (115).

Description

Line matching device and method of information retrieval terminal of communication processing system

1 is a general connection diagram for information retrieval between a subscriber matching unit of an exchange and an information center.

2 is a flowchart between a subscriber matching unit and an information center of an exchange for information retrieval.

3 is a configuration diagram of a line matching device according to the present invention.

4 is a detailed configuration diagram of a line matching device according to the present invention.

5 is a flowchart of a line matching method of an information retrieval terminal of a communication processing system according to the present invention.

* Explanation of symbols for main parts of the drawings

11: switch 12: subscriber line

13: modem or preprocessing device for telephone network

14: host computer or terminal

31, 41, 111: trunk matching unit 32, 112: signal service device

33, 42, 113: subscriber control processor

114: analog subscriber card

115: ring generator 116: switchboard

117: test apparatus 131: overvoltage protection unit

132: impedance matching unit 133: modem / telephone switch

134: ring detector 135: 2-wire-4 wire / 4 wire-2 wire converter

136, 343, 433: modem

137, 344, 434: RS-232-C signal converter

341, 431, 1141: subscriber control processor interface unit

1142: codec

1143: monitoring, power supply, 4-wire-2 wire / 2 wire-4 wire conversion unit

1144 ring supply unit 1145 test unit

1146: overvoltage protection unit 34, 43: line matching device

35, 44: data processing unit or host computer

342, 432: codec 4311: channel selection circuit

4312: Mode selection circuit 4313: Parallel / serial conversion circuit

4314: board identification circuit

The present invention provides an information retrieval terminal line matching device of a communication processing system which performs various conversion functions to retrieve information of an information center connected to a packet network by using an information retrieval terminal and a personal computer accommodated in a general public telephone network. It is about a method.

Recently, due to the mass distribution of PCs, many homes are increasingly using the public payphone network to search for information from information providers. In addition, the number of information providers is expected to increase drastically due to the government's policy of distributing 20 million PCs in the 2000s. Under these circumstances, network operators are actively pursuing the introduction of packet networks to accommodate information providers in general public telephone networks, and it is difficult for information providers who want to provide information by accessing existing telephone networks. Therefore, a circuit matching device that can be directly connected to the trunk is required.

Therefore, the present invention enables an information retrieval terminal of a communication processing system to accommodate an analog subscriber matching card, a subscriber line, and a modem for accessing a telephone network in a general public telephone network, so as to directly connect to a relay line input signal for efficient operation. It is an object of the present invention to provide a circuit matching device and method.

In order to achieve the above object, the circuit matching device according to the present invention is connected to an external subscriber control processor interface means, connected to the subscriber control processor interface means and an external digital trunk matching unit to supply a call signal from the interface means. Modem means connected to the codec means for transmitting the request data, the codec means and the subscriber control processor interface means, the call signal supply request data is supplied from the codec means, off-hook in response to a response command, and transmitted to the subscriber control processor interface means. And a modem means connected to the codec means and the modem means and an external data processor, and received from the codec means, and transmitted to or received from the codec means and the modem means and the external data processor. RS-232-C signal conversion means for transmitting data to the data processor.

In addition, the circuit matching method according to the present invention is applied to the circuit matching apparatus, the first step of initializing the codec means and waiting until receiving the call signal supply request data from the calling subscriber, the modem means call signal A second step of determining a signal processing method upon receiving supply request data and waiting for receiving a call command and a response command; when the modem means receives a call command or a response command from the external data processing unit, an off-hook signal is transmitted to the external The third step of transmitting to subscriber control processor and sending response signal to the calling party and starting communication negotiation; if communication negotiation fails, release connection; if communication negotiation is successful, relay login message, relay password message and disconnect A fourth step of retrieving whether a command has been received, and until a disconnect command is received; Repeated use of a beam while receiving a connection release command was to include a fifth step of releasing the connection.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention;

1 is a general connection diagram for retrieving information between a subscriber matching unit and an information center of an exchange, 11 is a switch, 12 is a subscriber line, 13 is a modem or preprocessor for a telephone, 14 is a host computer or terminal, 111 is digital Trunk matching unit, 112 is a signal service device, 113 is a subscriber control processor, 114 is an analog subscriber matching card, 115 is a ring generator, 116 is a switchboard, 117 is a test device, 131 is an overvoltage protection unit, 132 is an impedance matching unit, 133 Is a modem / telephone switch, 134 is a ring detector, 135 is a 2-wire-4 line / 4-to-2 wire converter, 136 is a modem, 137 is an RS-232-C signal converter, 1141 is a subscriber control processor interface, 1142 denotes a codec unit, 1143 monitors and supplies power, a 4 wire-2 wire / 2 wire-4 wire conversion unit, 1144 a ring supply unit, 1145 a test unit, and 1146 an overvoltage protection unit, respectively.

Signaling service device 112 of the terminating exchange 11 in which a modem of an information center dialed by a subscriber using an information communication terminal such as an information retrieval terminal or a personal computer accommodated in a telephone network for retrieving the information contents of the information center is accommodated. When a relay line communication path is formed to transmit and receive signals between stations in the outgoing exchange period, the subscriber control processor 113 of the terminating exchange exchanges the corresponding channel through the subscriber control processor interface 1141 in the analog subscriber registration card 114. Send call signal supply request data to step 1142; When the codec 1142 transmits the call signal supply request data to the ring supply circuit 1144, the ring supply circuit transmits a 75V 20Hz call signal from the ring generator 115 under the control of the subscriber control processor 116 and the subscriber line. It transmits to the modem 13 of the information center (host computer or terminal; 14) via (12). When the modem 13 of the information center supplies the call signal to the modem 136 through the ring detector 134, the modem 136 receives the signal a certain number of times and then off-hooks it. When the modem is off-hook, the monitoring circuit 1143 in the analog subscriber matching card of the exchange detects it and notifies the subscriber control processor 113 through the subscriber control processor interface 1141.

The subscriber control processor 113 transmits the corresponding time slot information in the sub highway signal from the digital trunk matching unit 111 to the codec 1142. At the same time, the modem 136 switches the modem / telephone switch 133 to the modem mode, sends a response signal (2100 Hz) to the calling subscriber, and then attempts to negotiate communication with the calling subscriber to set up a call path. When the call path is established, the information data is prevented from overvoltage inflow from the subscriber or line via the digital trunk matching unit and the 4-wire-2 wire (or 2-wire-4 wire) conversion unit 1143 of the calling subscriber and the destination exchange. The overvoltage prevention circuit 1146 and the overvoltage prevention circuit 1146 for preventing overvoltage inflow from the subscriber line through the switchboard are transmitted to the subscriber line through the switchboard. In the clearinghouse, the overvoltage prevention circuit 131 for preventing the inflow of a signal received through the subscriber line to the exchange and the subscriber line impedance matching circuit 132 and the 2-wire-4 wire (or 4-wire) that influence the communication quality. -2 line) to the modem 136 via the conversion unit 135. The modem 136 demodulates the received signal and transmits it to the host computer through the RS-232-C signal converter 137 for signal matching with the host computer. In the exchange, a test apparatus 117 and a test apparatus connection circuit 1145 for testing a subscriber line are provided.

2 is a signal flow diagram between a subscriber matching unit and an information center of an exchange for information retrieval.

When the subscriber dials an originating call, the originating exchange sends an occupancy signal to the called exchange to occupy the corresponding trunk line with the called exchange, and the called exchange receives and analyzes the selection signal from the originating exchange and then The call signal is sent to the modem or preprocessing device for the telephone network connection. The call signal is sent to the calling modem through the relay line to indicate that the call is connected to the calling modem. The receiving modem receives off-hook after receiving a certain number of call signals, and the receiving exchange notifies the called subscriber's response status to the calling exchange, and the connection to the telephone network is established, and the communication negotiation between the calling subscriber and the called subscriber modem is established. This is done.

When the communication negotiation is made, the login message required from the host computer is sent to the calling party's terminal, and when the calling party enters his login name, the computer prompts for the password immediately. Information retrieval begins.

When the information retrieval is completed and the calling subscriber detects the loss of the carrier signal caused by the termination of the call by the normal procedure or the one-way power off of the modem, the modem is hooked on. At this time, the analog subscriber matching processor of the exchange immediately releases the telephone network call upon detecting the hook-on signal.

3 is a configuration diagram of a circuit matching device according to the present invention, 31 is a digital trunk matching unit, 32 is a signal service device, 33 is a subscriber control processor, 34 is a circuit matching device, 35 is a data processing unit or host computer, and 341 is a subscriber. A control processor interface unit 342 denotes a codec, 343 a modem, and 344 denotes an RS-232-C signal converter.

The line matching device according to the present invention includes a subscriber control processor interface unit 341, a codec 342, a modem 343, and an RS-232-C signal conversion unit 344 as shown in FIG. .

When a subscriber using an information communication terminal such as an information retrieval terminal or a personal computer accommodated in the telephone network calls the communication processing system or the information center of the telephone network, the signal service device 32 under the control of the subscriber control processor 33 is an originating exchange. Transmit and receive signals between stations to form a relay line. When the relay line call path is formed, the subscriber control processor 33 of the communication processing system or the telephone network supplies call signal supply request data to the codec 342 of the corresponding channel through the subscriber control processor interface 341 in the line matching device 34. 346 is supplied to the modem 343 for reception by the modem, or the call signal supply request data 347 is sent to the data processing unit or the host computer 35 via the RS-232-C signal conversion unit 343. The modem 343 receives a response command from the data processing unit 35, or the subscriber control processor 33 sends a direct channel connection request message 36 to the data processing unit so that the data processing unit 35 receives the modem 343. When the modem 343 receives a response command to the modem 343, the modem 343 is immediately off-hook, and this signal is reported to the subscriber control processor 33 via the subscriber control processor interface 341. The subscriber control processor 33 establishes a call path between the corresponding channel of the line matching device 34 connected to the digital trunk matching unit 31 and the calling party. Thereafter, negotiation between the modem of the corresponding channel and the calling party modem is started to establish a data communication path, and transmission and reception of information data is started. The transmitted / received data is transmitted to the data processing unit of the communication processing system or the host computer 35 of the information center through the RS-232-C signal conversion unit 344 through the modulation and demodulation process of the modem 343.

4 is a detailed configuration diagram of a circuit matching apparatus according to the present invention, 41 is a digital trunk matching unit, 42 is a subscriber control processor, 43 is a circuit matching device, 44 is a data processing unit or host computer, 431 is a subscriber control processor interface unit, Reference numeral 432 denotes a codec, 433 denotes a modem, 434 denotes an RS-232-C signal converter, 4311 denotes a channel selection circuit, 4312 denotes a mode selection circuit, 4313 denotes a parallel / serial conversion circuit, and 4314 denotes a board identification circuit.

In the line matching device 43 according to the present invention, the two-line-four-wire-four-wire-two-conversion unit and the overvoltage protection which overlap each other in the connection configuration of the analog subscriber matching unit and the telephone network connection modem of the exchange shown in FIG. The circuit cancels and removes the ring generator, the ring supply circuit, and the ring detector to remove the function so that the modem 433 receives the function using the call request supply data 435 in the codec 432, or the call request supply. When the data 436 is transmitted to the data processing unit 44 via the RS-232-C signal changing unit 434, the modem receives and responds to the response command from the data processing unit 44, or when there is a call request. The subscriber control processor 42 directly transmits the corresponding channel connection request message to the data processing unit 44 so that the data processing unit 44 receives and receives a response command from the modem of the corresponding channel. In addition, by connecting the codec 432 and the modem 433 directly, it is possible to eliminate the subscriber line and switchboard that takes about 4 km, thereby reducing the cost required to install the line, and can avoid the loss in the line communication Can improve the quality.

The test unit can be deleted by using the loopback test function built in the modem, and the supervisory circuit can convert the output signal from the modem 433 to the parallel / serial conversion circuit connected to the mode selection circuit 4312 in the subscriber control processor interface unit 431. Alternately, this is accomplished by collecting signals from multiple channels via 4313 and passing them serially to subscriber control processor 42.

The subscriber control processor interface unit 431 is connected to the channel selection circuit 4311 connected to the subscriber control processor 42 and the subscriber control processor 42 and the channel selection circuit 4311 to select a mode to select each channel. The board selection path 4314 connected to the subscriber control processor 42 to grasp the mounting mode of the mode selection circuit 4312 and the circuit matching board and the state of the circuit matching board.

When transmitting and receiving information data between the originating subscriber and the communication processing system, the PCM data is converted through the codec and transmitted to the digital trunk matching unit 41 as a sub highway signal in accordance with the clock signal. In addition, the information data is transmitted to the host computer 44 of the data processing unit or the information center through the RS-232-C signal conversion unit 434 through the modulation and demodulation process of the modem.

The channel selection circuit 4311 is composed of 3-8 decoders for selecting a corresponding channel to be mounted in the line matching device, and the mode selection circuit 4312 controls a mode for transmitting and receiving information with the codec of the channel selected by the decoder. It consists of a 2-4 decoder and a switch that is turned on / off in accordance with the decoder output. The parallel / serial conversion circuit 4313 and the board identification circuit 4314 are comprised of 74LS165 which is an IC for parallel / serial conversion.

5 is a flowchart of a line matching method of an information retrieval terminal of a communication processing system according to the present invention.

When power is supplied, the circuit matching device receives the codec initialization data from the subscriber control processor, initializes (51), and waits for a call request from the calling subscriber (53). If there is no call request from the calling party, it is still in the waiting state 52, and if there is a call request, processing starts according to the configuration of the scheme (54).

In case 1 (i.e., using signal line 346 in FIG. 3), call signal supply request data from the subscriber control processor is transmitted to the codec, and the codec controls 5411 using the data to control the switch of the call signal generation circuit. The call signal is sent to the modem (5412), and the call signal is received (5413).

If Case 2 (i.e., using the 36 signal line in FIG. 3), the subscriber control processor sends 5412 a direct channel connection request message to the data processing unit for the data processing unit to give a response command to the modem (5422) and the modem responds to this response. Wait for receipt of the command (5423).

In case 3 (i.e., using the 347 signal line in FIG. 3), call signal supply request data from the subscriber control processor is transmitted to the codec, and the codec uses this data as a Ring Indicator (RI) signal to perform RS-232. -C The signal is sent to the RI terminal of the signal conversion unit (5431). The data processing unit receiving the signal transmits to the corresponding channel (5432) and the modem waits for reception of this command (5433).

When the modem receives the call signal in case 1 or receives the response command from the data processor in case 2 and case 3, the modem transmits the off-hook signal 551 to the subscriber control processor. At this time, the call path of the telephone network is formed. The modem of the circuit matching apparatus waits for a predetermined time and transmits a response signal to the calling party (552). The modem of the circuit matching device starts a communication negotiation with the modem of the calling subscriber who received this signal. When this negotiation is successfully completed (553), the modem informs the data processing unit through the RS-232-C signal converter that the data communication path with the other modem is established. Thereafter, a connection is made between the corresponding channel modems of the calling subscriber's line matching device, and the login message required from the service processor of the communication processing system or the host computer of the information center is transmitted to the modem through the data processing unit (561).

The modem modulates it and sends it to the calling party's terminal (561). When the originating subscriber enters his or her login name, the service processor prompts for a password 562 immediately. If the originating subscriber responds 562 with the correct password and confirms that the subscriber is a legitimate subscriber, the information usage is started 57.

However, if it is found to be an unjust subscriber, a certain number of retries are performed, and if it is still not found to be a valid subscriber, the service processor instructs the modem to disconnect and the modem receives this command (563). As soon as the hook is on.

After the information retrieval is completed and the call connection is terminated according to the normal procedure, the service processor analyzes this and sends a disconnection command to the circuit matching. The modem hooks on immediately upon receiving this command 58 and notifies the subscriber control processor. This releases the call connection of the telephone network (59).

Therefore, the present invention made as described above has the following application effects.

Firstly, it is possible to realize the general connection configuration of single or spliced modems installed in the analog matching card, switchboard, subscriber line, and information center of the exchange by combining the line matching device, such as ring generator, ring detector, and test device. The overvoltage protection circuit and the 2-wire-4 wire / 4 wire-2 wire conversion circuit, which are duplicated with the deletion, can be easily simplified.

Second, the cost can be drastically reduced due to the installation of subscriber lines that require about 4 km and the elimination of ring generators and test equipment.

Third, the loss of about 7 dB and the loss caused by the conversion circuit can be avoided by not using the subscriber line and the two-four-four-four-wire-two conversion circuit, and the quality can be greatly improved.

Fourth, it is possible to prevent the overvoltage inflow from the subscriber line, and by eliminating the telephone line, the reliability is improved by not using the high voltage signal.

Fifth, it solves the wiring problem such as power supply and telephone line connection and fixed signal reporting of stand-alone or collective modem used in the information center, thereby maximizing the efficiency of operation management.

Claims (4)

Subscriber control processor interface means 341 connected to an external subscriber control processor 33, a call signal from the interface means 341 connected to the subscriber control processor interface means 341 and an external digital trunk matching unit 31; The supply request data 345 is connected to the codec means 342, the codec means 342, and the subscriber control processor interface means 341, so that the call signal supply request data 346 is supplied from the codec means 342. A modem means 343 which is supplied and off-hook in response to a response command and is transmitted to the subscriber control processor interface means 341, and connected to the codec means 342, the modem means 343, and an external data processor 35. To transmit the call signal supply request data 347 input from the codec means 342 to the data processor 35 or to receive it from the modem means 343. A data line matching device of the search device comprising: the data processing unit (35) RS-232-C signal conversion means 344 to be transmitted to. 2. The subscriber control processor interface means 341 is connected to the external subscriber control processor 33 for channel selection means 4312, the subscriber control processor 42, and mode selection means. Channel selection means 4311 connected to 4312 to select a channel, parallel / serial conversion means 4313 connected to the modem means 343, subscriber control processor 42, and mode selection means 4312, and And a board checking means (4314) connected to the subscriber control processor (42) for checking the mounting and dismounting state of the line matching board. Subscriber control processor interface means 341 connected to an external subscriber control processor 33, a call signal from the interface means 341 connected to the subscriber control processor interface means 341 and an external digital trunk matching unit 31; It is connected to the codec means 342 to which the supply request data 345 is transmitted, the codec means 342 and the strong visa control processor interface means 341, and the call signal supply request data 346 is supplied from the codec means 342. A modem means 343 which is supplied and off-hook in response to a response command and is transmitted to the subscriber control processor interface means 341, and the codec means 342 is connected to the modem means 343 and an external data processor 35. And transmit the call signal supply request data 347 inputted from the codec means 342 D to the data processor 35 or received from the modem means 343. A line matching device including RS-232-C signal conversion means 344 for transmitting data to the data processing section 35 or for transmitting data received from the modem means 343 to the data processing section 35. In the line matching method to be applied, the first step of initializing the codec means 342 and waiting for receiving the call signal supply request data from the calling party, when the modem means 343 receives the call signal supply request data, A second step of determining a signal processing method and waiting for receiving a call command and a response command; when the modem means 343 receives a call command or a response command from the external data processing unit 35, an off-hook signal is output to the external signal. A third step of transmitting to the subscriber control processor 33 and transmitting a response signal to the calling party and starting communication negotiation; if communication negotiation fails, the connection is released and communication negotiation is performed. If this is successful, the fourth step of relaying the login message, relaying the password message, and searching whether the disconnect command has been received, and continuing to use the information until the disconnect command is received, and disconnecting when the disconnect command is received. Rotation matching method comprising the five steps. 4. The method of claim 3, wherein the second step comprises: a sixth step of determining a processing method when the modem unit 343 receives call signal supply request data; and after performing the sixth step, the external subscriber control processor ( After transmitting the call signal supply request data output from 33) to the codec means 342 and transmitting the call signal to the modem means 343 and waiting for reception of the call signal, after performing the sixth step, The subscriber control processor 33 sends the direct channel access request message to the data processing unit 35, and the modem unit 343 waits for a response command from the data processing unit 35, and the sixth step. After execution, the call signal supply request data outputted from the subscriber control processor 33 is received, and a RI (Ring Indicator) signal is sent to the RS-232-C signal converting means 344 and the data is received. And a ninth step of waiting for a response command of the corresponding channel transmitted from the data processing unit (35).