Toa TS-821 Instruction Manual Download Page 3

2. GENERAL DESCRIPTION 

The TS-821 and TS-921 Chairman units, and the TS-822 and TS-922 Delegate units are designed 

for use in the TOA infrared conference systems. 

These units provide wireless communication via the Infrared Transmitter/Receiver unit 

connected to the Central unit.

Two types of dedicated microphones are made available for the Chairman and Delegate units as 

optional products: the TS-923 standard type and the TS-924 long type.

3. FEATURES

• Since the Chairman units and the Delegate units require no wiring, they permit easy 

installation based on a free layout.

• Up to 192 TS-821/822/921/922 units connectable to the TS-920RC.

• Up to 64 TS-821 and TS-822 units connectable to the TS-820/820RC.

• 

Both 

TS-921 and TS-922

 units equipped with Voting and base/translation language selection 

functions and 

TS-821 and TS-822

 units designed primarily for speaking and monitoring can be 

freely used. In the case of the 

TS-821 and TS-822

 units, they can monitor the base language 

only. 

• Priority Speech key to take precedence over Delegate units.

• Status after priority speech, Priority Chime ON/OFF function, and priority speech key operation 

mode settable by a DIP switch.

• The TS-921 is equipped with a voting function enabled by the DIP switch setting.

• 

Chairman and Delegate units

 microphones are attached via XLR connectors that permit easy 

detachment for more space-saving convenience in storage. 

• Two types of 

Chairman and Delegate units

 microphones are made available and freely 

interchangeable: Standard type and Long type. 

This is a class A product. 

In a domestic environment this product may cause radio interference in which case the 

user may be required to take adequate measures.

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