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3.10.3 Connection with the Exchange
Connect speakers to terminals 1 and 2 as shown in the diagram. (Leave
terminals 3 and 4 open.)
3.10.4 On/Off Control of BGM
BGM can be turned off when the jumpers are connected as shown in the
diagram. If the jumpers are not connected, BGM will be heard from the
speaker stations constantly. (See page 24.)
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