INTERFAING METHOD BETWEEN EXTERNAL COMPUTER SYSTEM AND PRIVATE EXCHANGER

摘要

The method minimises the response time of the message and recovers the message loss by detecting the transmitted data error. The method for transmitting the message comprise steps; (a) checking the response of the data reception for certain time after sending the enquiry (ENQ); (b) formatting and sending the transmitting message when receiving the positive response; and (c) resending the data again when no-response is received from the receiving part for certain time. The method for receiving the data comprises steps; (a) buffering the message data; (b) converting the received data; (c) comparing the present check-sum data to the former one; (d) sending the positive response when the compared results are same, otherwise negative one.