operator call-in signal

... ) operator call-in signal 话务员呼入信号 ) operator call-in signal 呼叫话务员信号 ) Operator Signal OPR 话务员信号 ...

... ) Paging Operator 寻呼员/话务员 ) operator call-in signal 话务员呼入信号 ) operator call-in signal 呼叫话务员信号 ...