呼叫转移的四种方式无条件前转(CFU)CallForwardingUnconditionalsupplementaryservice遇忙前转(CFB)CallForwardingonmobilesubscriberBusysupplementaryservice呼叫不可及前转(CFNRc)CallForwardingonmobilesubscriberNotReachablesupplementaryservice呼叫无应答前转(CFNRy)CallForwardin...

时间:2024-10-26 10:45栏目:行业资料