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Over 10 cm

9. SPEAKER ZONE SELECTION

Pressing the front-mounted ZONE 1 switch permits its zone indicator to light and makes broadcast through the

speakers connected to the rear-mounted Zone 1 output terminals.

Operation for ZONE 2 is performed in the same way as above.

Shorting the Emergency Control or Telephone Paging Control input terminals turns on both Zone 1 and 2

switches (their indicators light), even if off, allowing the Emergency or Telephone Paging input signals to be

broadcast from both ZONE 1 and 2 speaker outputs.

Opening the control input terminals automatically returns the operation to the original status.

10. INSTALLATION

Keep the unit's all sides over 10 cm away from objects that may obstruct air flow to prevent the unit's internal

temperature rise.

11. RACK MOUNTING

To mount the unit in a standard 19" equipment rack, use the optional MB-25B Rack Mounting Bracket.

Attach the MB-25B to the unit using the supplied 4 screws. When using other screws, each screw must be

shorter than 16 mm.

MB-25B

M4 x 16 Machine screw

included in MB-25B

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Toa A-1803 Specifications

General