сброс вызова(Reports are popping up all over the Microsoft community forum from people having weak signals and call drops problem with their expensive Surface Duo phone.ssn)
группа коллективного вызова(Calling groups allow an incoming call to ring simultaneously on all telephones in a group, for example, a customer service group. Yuri Ginsburg)
Обработка большого числа вызовов(MAS; This service feature allows processing of huge numbers of incoming calls, generated by broadcasted advertisings or games. ALAB)