Toa TS-780 Series - Manual (Page 45)

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Step 3. Set the Test switch on the front panel of the Central unit to ON. (Test mode)
The Test indicator lights together with the conference unit's Microphone in-use indicator and the
indicator on the microphone.
Note that as the number of connected conference units increases, several seconds may elapse before
the indicators light.
When all indicators for the installed conference units light, this completes connection confirmation.
In this event, if the indicators of a certain conference unit do not light, check the connections of the
microphone and those between the Central unit and conference units.
Step 4. After completing the test, shift the Central unit's Test switch back to the OFF position. (Test mode off)
Note that as the number of connected conference units increases, several seconds may elapse before
the indicators go off.
OFF ON
TEST
TS-780 Central unit
Test indicator: Lights
Test switch: ON
Indicator: Lights
Microphone in-use indicator: Lights
TS-781 Chairman unit or TS-782 Delegate unit