The TS-811 is a chairman unit that can be connected to the conference system by a cable. It is equipped with a priority switch, allowing speech to take precedence over the delegate unit. The TS-811 is directly connected to the TS-919B1 or TS-919B4 bridge unit, then to the TS-910 central unit via the TS-918 expansion unit.
Either the standard type or long type can be selected for the microphone.