VERFAHREN FUER EINE AUS EINER HAUPTSPRECHSTELLE UND MEHREREN NEBENSPRECHSTELLEN BESTEHENDEN NEBENSTELLENANLAGE MIT ZWEI AMTSLEITUNGEN.

摘要

The office telephone exchange circuit, coupled to two separate external lines (AL1,AL2) has a control microprocessor (MP) for allowing each subscriber appts. (Sp1..Spn) to be connected to a free external line and for switching through an incoming call to the required subscriber appts. (Sp1...Spn). Each external line (AL1,AL2) delivers selection information to a reception circuit (MFV-E1,MFV-E2) coupled to the common microprocessor (MP) with individual mircoprocessor controlled contact pairs (M11,Min,M21,M2n) used to couple each line (AL1,AL2( to the required subscriber appts. (SP1..SPn). The microprocessor responds to the connection being released to process the next selection request in the order in which the latter are received.