Bosch DCN Next Generation Operation Manual page 19

Conference System
Mix-minus
Use the Mix-minus mode to connect via audio input and audio output 2:
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Notice!
The Mix-minus connection prevents acoustic feedback.
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Figure 3.6: Mix-minus
Notice!
Use a telephone coupler, in case of long distances between the two systems
Bosch Security Systems B.V.
A telephone coupler.
Two systems.
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CCU
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Operation Manual
System Overview | en
2013.11 | V2.0 | DCN-NG_OM_V4.x
19