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In order to solve the problem of code error in the out-trunk pulse-repeater of electromechanical switching system, a new kind of signal transmitting system designed with computer technique is introduced. It can converts signal pulses transmitting from the electromechanical switch-board out-trunk into DTMF (Duration Time Modulation Frequency) signal. Statistical result for one-year operation in about one hundred users in Nanyang city shows that the new technique has raised the telephone correct connection rate from 70 percent to 98 percent or more.
In order to solve the problem of code error in the out-trunk pulse-repeater of electromechanical switching system, a new kind of signal transmitting system designed with computer technique is introduced. It can converts signal pulses transmitting from the electromechanical switch-board out- Trunk into DTMF (Duration Time Modulation Frequency) signal. Statistical result for one-year operation in about one hundred users in Nanyang city shows that the new technique has raised the telephone correct connection rate from 70 percent to 98 percent or more.