Terms for subject Makarov containing Subscriber Line

English	Russian
clear the line between the calling and the called subscribers	разъединять абонентов
each subscriber's line appears in multiple at several operator's positions	абонентская линия заводится в поле остальных коммутаторов
each subscriber's line appears in multiple at several operator's positions	абонентская линия заводится в многократное поле
subscriber line	абонентская линия (в телефонии)
the "busy tone" is sent back to the calling subscriber if the line he wants is busy	сигнал "занято" посылается абоненту в том случае, если линия не свободна