DSS-8224 can be configured as a pair of independent 2x1 switches or as a pair of 4x1 switches with common inputs. It accepts common serial digital signals at 143, 270, 360, 540Mbps and 1.485Gbps. All switches are performed in the vertical interval, timed to an external reference. Each switch can be controlled locally at the card-edge by an optional RCM-8120 control module or by GPI. Dash-board and optional SNMP monitoring is provided for input presence, reference present and output status.