KR910017807A - Personal Computer Embedded Telex Communication Circuits and Methods - Google Patents

Abstract

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Description

Personal Computer Embedded Telex Communication Circuits and Methods

Since this is an open matter, no full text was included.

1 is a block diagram showing a schematic configuration of a telex communication circuit according to the present invention, and FIG. 2 is a block diagram showing the detailed configuration of FIG.

Claims (8)

In a telex circuit for transmitting and receiving text using a dedicated line, computer connection means 10 connected to an option slot of a personal computer and responsible for communication between the personal computer and the telex circuit, Asynchronous communication means (40) connected to the computer connection means (10) and responsible for communication with a telex line and specifying a communication speed and a data format with a telex line, and connected to the asynchronous communication means (40). All function control and connection The central control means 20 for monitoring and controlling the operation of each part, the text that is connected to the central control means 20 and stores and transmits and transmits and transmits and receives software in ROM to control all functions of the telex. Is connected between the asynchronous communication means 40 and the telex line to store in the RAM, and facilitates connection with the telex network. A personal computer built telex communication circuit, characterized by consists of a connecting means (50). The personal computer built-in telex communication circuit according to claim 1, wherein the telex communication circuit is formed in a card form and mounted in an option slot of a personal computer. 2. The apparatus of claim 1, wherein the line connecting means (50) comprises: a transmission control circuit (51) connected to the asynchronous communication means (40), current switching circuits (52, 53, 56) connected to the transmission control circuit (51); A data selection circuit 58, a polarity determination circuit 59 connected to the data selection circuit 58 and a current switching circuit, a space current monitoring circuit 60 connected to the polarity determination circuit, and the polarity determination circuit 59 And an input terminal connected to the space current monitoring circuit 60 and an output terminal connected to the asynchronous communication means 40, the reception control and line monitoring circuit 61, the current switching circuits 52, 53, 55, 56, and A personal computer built-in telex communication circuit comprising a noise canceling filter (54) connected between telex lines. 4. The current switching circuits 52, 53, 55, and 56 of FIG. 3 are configured by four photo couplers PT1 to PT4, and the first photo coupler PT1: 52 and the fourth photo coupler PT4:. 56 to connect the constant current circuit 57 and the second photo coupler PT 53 and the third photo coupler PT3 55 connected thereto in parallel to the first and fourth photocouplers PT1 PT4. Connected to the noise filter circuit (54). The personal of claim 4, wherein the professional transmitter first photo coupler PT1 and the fourth photo coupler PT4 are turned on, and the professional receiver third photocoupler PT3 is turned on. Computer built telex communication circuit. 5. The terminal of claim 4, wherein the polarity discrimination circuit (59) is connected to a fourth photo coupler (56) and a data selection circuit (58) to transmit a response from a telex terminal to an alternating band for a transmission request and from a switchboard to a terminal telex. A built-in telex communication circuit for a personal computer, characterized by detecting a polarity reversal signal transmitted for a reception request of a computer. The space current monitoring circuit 60 is configured of a multi-vibrator to disconnect the telex communication and to switch to the standby state if the space state of the transmission / reception data is maintained for more than a predetermined time (300 ms). Personal computer built-in telex circuit. Computer connection means (10) connected to an option slot of a personal computer, asynchronous communication means (40) connected to the computer connection means (10), and central control means (20) connected to the asynchronous communication means (40). And telex communication using a personal computer built-in telex communication circuit comprising a memory means 30 connected to the central control means 20 and a line connection means 50 connected between the asynchronous communication means 40 and a telex line. In the method, the first step of initializing all functions in the circuit (310) after the self-diagnosis program is performed, and the second step of continuously monitoring (320, 330) transmission and reception requests by continuously monitoring the computer system and the telex line. Is a memory transmission request to transmit the contents recorded in the memory when the transmission request is detected from the main body and the main body (321), or a program or other request to modify a communication speed or an automatic response code. 322, check whether it is a direct communication request with the other party's telex (323) and return to the sensing state after completing the corresponding communication execution, and if a request from the line is detected or not to receive in the memory (331), And a third step of determining whether to receive in the direct communication state (332) to complete the required communication and return to the sensing state. ※ Note: The disclosure is based on the initial application.