KR890011308A - Data exchange method and circuit in electronic premises automatic switchboard - Google Patents

Abstract

No content

Description

Data exchange method and circuit in electronic premises automatic exchange

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

1 is a block diagram according to the present invention.

2 is a circuit diagram specifically showing one part of the 1-3 data subscriber circuits 20-22 of FIG. 1 according to the present invention.

Claims (3)

In a data exchange device of an electronic premises exchange machine equipped with a general telephone subscriber (100, 101) terminal (80-82) and a host computer (90), subscribers of the terminal (80, 82) are exchanged so that digital data can be exchanged with each other. The first and second data subscriber circuits 20-22 that can accommodate the first and second data subscriber circuits connecting the data transmitted from the first and second data subscriber circuits 20-22 with the counterpart data subscriber circuits. The time switch 40-41 and the other party's data subscribers can be exchanged data with the remote data subscribers through the digital PCM leased line when the other party's data subscribers are remote, and the subscriber circuits can be connected to the ordinary telephone subscriber telephones 100 and 101. First and second digital trunk line circuits 60-61 for digitally transmitting PCM voice signals between remote voice subscribers via a location, and the general subscribers 100 and 101, respectively, First and second trunk line connection circuits 50-51 for making a call with a subscriber connected to a public network (national speaker) 70 through 0-31, and a call request, monitoring, calling, and call termination for a voice call. And first and second main control devices 110-111 for overall control of the entire exchange, such as controlling call requests, monitoring, calling, and call termination for data terminal subscribers, as well as connecting a call path between subscribers for mutual communication. A circuit comprising: The method of claim 1, wherein the data subscriber circuit is connected to a scheme such as RS-422, RS-232C, or RS-232C current loop so as to enable electrical connection with the terminal, and converts the electrical signal into an electrical signal inside the exchanger. Drive circuit 201 for converting the electrical signal level of the terminal to the electrical signal standard and the serial data received from the terminal in various data formats such as SDLC, HDLC, ASYNCHRONOUS, X.25, BSC etc. The first and second serial input / output devices 202 and 203 for converting the predetermined bit parallel data into serial data of a protocol of the terminal, and the data storage speeds of the first serial input / output device 202 equal to that of the terminal. A clock generation and control circuit 207 which automatically adjusts at a speed, a program storage ROM 211 for controlling the 1-3 data subscriber circuits 20-22, and the first and second serials; A RAM 210 for temporarily storing information received from the output devices 202 and 203 and various data information for controlling the data 1-3 data subscriber circuits 20-22, and the 1-3 data subscriber circuits; In order to control (20-22), a clock timer circuit 208 for generating each real-time clock generator, watchdog timer, and the like for efficient program execution, and a first input / output device by a program stored in the ROM 211. Receives call setup information from 202 and analyzes it to send or receive information about call request, counterpart call information and connection to call to first and second main controllers 110-111, and controls to form a call and exchange data After the call is established with the other party, if the data from the first I / O device 202 is analyzed and transmitted to the other subscriber, the data is transmitted through the second I / O device 203 and transmitted to the first I / O device 202. If the connected subscriber completes the data exchange, it informs the 1-2th main control device 110-111 to complete the call, and receives data from the second I / O device 203 from the other subscriber. The central processing unit 213 that controls the entire 1-3 data subscriber circuit 20-22, and the like, and the exchanger that manages and controls the entire exchange system. -111) and a common memory method or a packet or dual port memory method to send and receive various call requests, call establishment, call monitoring, call cutting, etc., with the main controller 213 that controls the entire subscriber access circuit. From the central processing unit 213 and the exchange processor communication circuit 214 for the purpose of exchanging information with the central processing unit 213 between the first and second main controllers 110-111. Input and output The bus driver 212 drives the data signal line, the address signal line, and the control signal line, and the ROM 211 and the RAM 210 clock control to program the room 211 by the CPU 213. And an address decoder 206 for determining an address of the generation circuit 207, the first and second input / output devices 202 and 203, the clock timer circuit 208, and the internal processor communication circuit 204 to generate an enable signal for each circuit. And a second input / output device 203 for converting data input from the first input / output device 202 into n kbps serial data so as to be connected to the first and second time switches 40-41 simultaneously with the switch system clock. And n kbps data is converted into a 2.048 MHz burst rate by a predetermined bit at predetermined intervals from the 64 kbps serial data synchronized with the system clock in the first input / output device 203, and then the first and second time switches 40-41 are used. To convert the speed so that Speed converter 204 for changing the n kbps data input at the 2.048 MHz burst rate from the first and second time switches 40-41 to the n kbos rate of the burst rate n KHz and transmitting it to the second input / output device 203. ), A driving circuit 205 for driving various signals between the switch and the terminal subscriber circuit connection unit, and the internal processor communication circuit 214 by the system main controller 110-111 and the channel designation logic. A line decoder and control circuit 215 for generating an enable signal and a control signal addressable to control 209, and a predetermined bit of 2.048 MHz at a predetermined cycle period when being sent to or received from the speed changer 204 output. And a channel designation logic (209) for assigning data to one of the predetermined channels. In a data exchange method in an electronic premises automatic switchgear, the first step of adjusting the speed when the data transmission speed is not corrected by checking whether the data transmission speed is correct, and the transmission parameter is corrected when the transmission speed is correct in the first step. A second step of adjusting transmission parameters when they are not correct; a third step of checking call setup and dial input when the transmission parameters are correct in the second step, and transmitting a shear (occupancy) and dial number to the control device; Setting the busy in the subscriber status table from the third stage control device and analyzing the dial to check whether the busy bit in the status table of the subscriber subscriber port is set; and in the fourth step, The fifth step of informing the controller of the call during the call and displaying and displaying a message of the other party on the terminal; When not in a call, assign a channel to the caller port, specify a channel of the called port, connect the call path, and announce the connection to the call. Record and display the completion message and analyze whether the call completion data is promised by receiving the input data of the caller transmission data and the input data of the seventh step. An eighth step of outputting completion information when the call is completed; after performing the eighth step, the busy bit in the state table of the caller port and the called port is reset, the channel designation of the caller and the called port is cleared, and the call is made. In the ninth step of cutting, and in the ninth step, when the call is restored to the free state, the call is restored to the caller and the called port. Step 10 indicating the state and, characterized by made of an eleventh step of displaying the call completion condition of the step 10 to the message. ※ Note: The disclosure is based on the initial application.