| 摘要 |
An answering-operator device system, characterised in that each direct subscriber line (1) is connected through a separate system of a common line (2) to the individual call switching system (3) and the teleconference call switching system (4), which are connected with the control system (7), the individual call switching system (3) being connected directly, and the teleconference call switching system (4) being connected through an amplifier (5), to a collective system (6), to which the operator's set (8) is connected.<IMAGE>
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