Improvements in the Circuit of a telephone installation, in particular to an extra Telephone installation, controllable Operator posts planned.

摘要

_ (improvements in the Circuit of a telephone installation, in particular to an extra Telephone installation, controllable Operator posts planned.Consists of connection means of memorized (SPI) for recording the address of a subscriber has been called without positive results (T1) in dependence on the position of operator contact with negative Results (VP1) are reserved only for planned tasks and Such as mass or are equipped with a special Code.The Post Operator (VP1) were coupled Connection means (Z) to count the number of attempts to make communication of planned and Unplanned attempts to perform Communication.