Two-part terminal-strip connectors. The free part has screw terminals for the incoming cable and plugs into the fixed part built into the equipment. Most manufacturers using these connectors supply both parts of the connector with the equipment, but the free part is also offered separately for pre-wiring, testing or maintenance. Each connector has three pins and carries one audio circuit.
Two-part terminal-strip connectors, smaller than the standard Phoenix connector. They are otherwise similar in features and application.