Multistage coupling field coupling points testing - connects subscriber lines to coupling group via subscriber circuits or exchange transmission

摘要

Systematic testing of coupling points is for multistage communication, esp. telephony, facility coupling field. It is modified to check the coupling point (63) of the coupling group (KGO). The subscriber lines (TL) are connected to the group via subscriber circuits (TS) or exchange transmissions or other sets, and the subscriber circuits (TS3) are activated sequentially while the simultaneously-switched through coupling points of one column (ZL6) or line, as well as a coupling point (07) in the other column or line, remain switched through. In this way, the potential and/or signals originating from the subscriber circuit or sets completely or partially take over the duties of the sender or receiver.