method for centrally controlled fernmeldevermittlungsanlagen, especially fernsprechnebenstellenanlagen with vermittlungsplaetzen different operating mode.

摘要

1. Method for centrally controlled telecommunications systems, in particular private branch exchanges, having a plurality of exchange stations in different operating modes, where each exchange station is assigned a centrally arranged storage location (VP1-VPX), which contains the free-engaged state of the exchange station, in a state store (VPZSP), and where different call types are present, characterised in that the exchange stations having the same operating mode are combined in exchange station groups (A, B, C, D), that in an exchange station list store (VPLSP), a storage location (VP (Az), VP (Bz), VP (Cz), VP (Dz)), containing the number of the last seized exchange station, is arranged for each exchange station group, that furthermore for each exchange station group, there is provided a separate exchange station group store (VPASP, VPBSP, VPCSP, VPDSP) which contains the address of the individual exchange stations assigned to the group, in a fixed sequence, and that in the event of an incoming call (a), in an allocation list store (ZLSP) an exchange station group having the operating mode (A, B, C, D), which matches this call, is allocated in accordance with the call type (a), and that following the read-out from the exchange station group store (e. g. VPASP), of the number of the last seized exchange station of this exchange station group, a free exchange station of this group is ascertained by means of a cyclically executed search operation starting with the following number (VP (Az) + alpha), the free-engaged test of the exchange stations being respectively effected with the aid of the state store (VPZSP).