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2. GENERAL DESCRIPTION
The TOA TS-820 Series conference system employs its infrared wireless system unit.
The Infrared chairman and Delegate units (collectively referred to as "Conference units") provide wireless
communication via the Infrared transmitter/receiver unit connected to the Central unit. Since wiring to the
individual Conference units is not required, they can be easily installed in freely versatile configurations.
A total of up to 64 Infrared conference units can be connected to the Central unit of each system.
The Infrared transmitter/receiver unit is required for connection of the Infrared conference units. (Refer to
The Central unit is used to perform system function settings, status display, etc.
3. FEATURES
• The number of Conference units to be used can be freely selected depending on the number of participants.
A total of up to 64 Conference units can be installed in a single system.
• Open Microphones Number Setting function supports well-organized meeting, avoiding the confusion that
can result from too many speakers trying to talk simultaneously.
• A Speech Priority Selector function permits selection of operating priority (first-in-first-out or last-in-first-out)
when the Speech key is pressed.
• If any microphones are not manually turned off after speaking, the system’s Mic-Off function automatically
switches them off if not in use for approximately 30 seconds.
• A built-in Feedback Suppression Function (FBS) ensures more efficient reduction of acoustic feedback*.
When Conference units are in use, their monitor speakers are automatically turned off, eliminating concerns
about acoustic feedback.
• Depending on installation requirements, wired microphones, music playing equipment and other devices can
be freely combined and used within the system.
• The Central unit has a recording function that allows it to save recorded files to either a portable USB memory
device or its own internal memory. An external recording device can also be connected, making it ideal for
recording the minutes of a conference. (TS-820RC only)
* Acoustic feedback: The squeal or howl of a sound loop created when speaker output is picked up by a
microphone, amplified by an amplifier and further output from the speaker again.
[Conference unit]
• Features a selection of both Chairman and Delegate units.
• Chairman units feature a Priority Speech Key Operation function that allows the Chairman unit to take speech
priority over the Delegate units with the simple press of a button.
• Conference unit microphones are attached via XLR connectors that permit easy detachment for more space-
saving convenience in storage.
• Two types of Conference unit microphones are made available and freely interchangeable: Standard type
and Long type.
• Infrared signal communication eliminates worries about radio interference and eavesdropping, making it
possible to use the system simultaneously in adjacent rooms.
• Units can be powered by either line AC or rechargeable lithium-ion batteries.
• Up to 16 TS-905 Infrared Transmitter/Receiver units, or up to 12 TS-907 units can be installed in a single
system. (If both models are combined in the same system, a total of up to 12 units can be installed.)
