| 摘要 |
The method involves sending a signal indicating readiness to a main station (M1) after switching-on the main station. Access to the main station is denied in an announcement mode until additional main stations do not report the announcement mode, where the main station occupies a frequency range that is free and undisturbed. The main station is switched to the announcement mode, where the main station provides an announcement mode signal to the additional main stations. Service frequency channels are arranged in the main station. An independent claim is also included for a hazard alert system for radio transmission of alarm data. |
