Preoccupy On Busy

同义词释义

1)Preoccupy On Busy,遇忙预占2)camp-on to a group,遇忙预占群3)operator wait on busy,话务员遇忙预占4)attendant camp-on,话务台遇忙预占线5)Camp-On With Recall,有回叫的遇占,遇忙再占,遇忙二次呼叫6)CFB Call Forwarding on mobile subscriber Busy,遇忙前转