DIGITAL REMOTE SWITCHING UNIT

摘要

A DIGITAL REMOTE SWITCHING UNIT A remote switching unit which serves a large digital switching system is shown. The remote switching unit is CPU controlled and interconnects focal subscribers to the large switching system. Digital spans connect the remote switching unit to the large switching system. A space switching stage provides for switching local traffic (traffic with the remote switching unit) and remote traffic (traffic from or to the large switching system). In addition, the remote switching unit provides an extended switching capacity with connections to smaller switching units.