| 摘要 |
PURPOSE:To allow a caller to recognize it that a called party is disable of reply at present and when the reply is available and to prevent succeeding useless call by informing a reply enable time to a radio station with respect to a call from other radio station. CONSTITUTION:A PSK modulated signal with a predetermined frequency from other radio station is received by a reception section 2 and amplified up to a required level and demodulated by a PSK demodulation section 3. The demodulated signal is inputted to a protocol handier 9. When the reception signal satisfies a specified format, data are sent from the protocol handier 9 to a control section 8. The specified format is started by a flag pattern representing by 01111110 and ended by a similar flag pattern. When 1s are consecutive by 6 patterns or over in the information other than the flag pattern, a sender side '0' is inserted as a dummy bit after consecutive 1s by 5 patterns and the receiver side eliminates the '0', then is are consecutive by 6 patterns for the flag pattern only. Number information of a destination station is recorded in an address part. |
