Configuration circuit for ISDN-interface has different ISDN interface having coded plugs or sockets in between, and can be switched into different ISDN-interface modes

摘要

Configuration circuit has different ISDN interface having coded plugs or sockets in between, and can be switched into different ISDN-interface modes. A chip side of a passive receiver circuit for SO and Up is arranged in between ISDN-transformer and ISDN chip.