Digital CrossconnectSystem (DCS) is a high-speed switch for data channels that accepts its own commands for switching, regardless of the data
transmitted.A Digital Crossconnect System switches digital channels from one device to another in digital telephone networks
by establishing cross-connects between digital channels. Digital crossconnect systems come in the form of Broadband Digital Crossconnect System (BDCS) or Wideband Digital Crossconnect System (WDCS), which are broadband digital switching systems used in ATM networks or SDH. In ATM, virtual paths (VP) are switched via such a switching device.