Toa TS-770 Series - Manual (Page 25)

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11. IF USING MULTIPLE CENTRAL UNITS:
Up to 3 Central Units (up to 210 conference units) can be simultaneously used.
Note
The Speaker Restriction and Automatic Mic-Off functions will not be applied correctly if settings are performed
differently for each Central unit.
Step 1. Perform connections and adjustments for each Central unit.
Follow Steps 1 – 11 on pages 21 – 24 for each Central unit.
Step 2. Set the Central unit's rear-mounted Expansion switch.
Set the Expansion switch of one of the connected Central units to MAIN, and the remaining Central
units to EXPANSION.
To shift the switch position, loosen the lock screw for the Expansion switch and retighten the screw
after the position change has been completed.
TS-770 Central unit
Lock screw Lock screw
When set to MAIN
(Factory preset)
Expansion switch
When set to EXPANSION
Step 3. Make connections between Central units.
Connect the Expansion IN-OUT terminals mutually between Central units, as shown below. Note that
the CTRL terminal of the Main Central unit must be connected directly to each CTRL terminal of the
Expansion Central unit(s) using a single line.
TS-770
(For the MAIN setting) TS-770
(For the EXPANSION setting) TS-770
(For the EXPANSION setting)
(For the EXPANSION setting)
Expansion IN/OUT terminals (For the EXPANSION setting)
Expansion IN/OUT terminals (For the MAIN setting)
Expansion IN/OUT terminals
Note
Because no cables are supplied for connection between Central units, please prepare separately.