通过本发明，使得被叫终端可以不受呼叫打扰，并且主叫终端也能够知晓被叫终端拒接呼叫的情况。
Through the invention, the called terminal is not disturbed by calling, and the calling terminal can learn the condition that the called terminal refuses the calling.
本发明能够快速搜索到当前系统中可用的转发器或者主叫终端， 进一步向所述转发器或主叫终端进行同步。
The invention can search out usable transponder or calling terminal in current system quickly, and further synchronize the transponder or calling terminal.
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