同义词
1)completion of calls to busy subscribers (CCBS),完成到示忙用户呼叫2)Completion of Call to Busy Subscriber CCBS,遇忙呼叫完成3)completion of call to busy subscriber,遇忙呼叫完成目标4)calling forwarding on mobile subscriber busy (CFB),当被呼移动用户忙时的呼叫转5)closed user group call indicator,闭合用户群呼叫指示符6)incomplete call,未完成呼叫
