Circuit arrangement for a centrally controlled telecommunications switching system, in particular a telephone PABX system

摘要

The invention relates to a circuit arrangement for a centrally controlled telecommunications switching system, in particular a telephone PABX system, with a central controller containing two control mechanisms and with a speech path switching network. According to the invention, in the case of duplicated central control mechanisms, both control mechanisms simultaneously perform operational and safeguarding functions, whereas only one of the two control mechanisms always performs switching functions. <IMAGE>