Device Set-Up; Acoustic Feedback - Bosch DCN Next Generation Operation Manual

90 en | Planning
4.7

Device set-up

4.7.1 General
Caution!
Do not put objects on top of devices. Objects can fall through the airflow holes. A blockage of
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the airflow holes can cause a risk of fire.
Caution!
Do not put the devices near or above a radiator, heat grill or in direct sunlight.
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Caution!
! Do not cause vibration of the devices.
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4.7.2 Cables
Use different cable ducts for the extension and mains cables. Identify each cable with a label
and divide trunks to manageable geographic locations. In public areas where people can touch
or move above the connectors and cables, use metal protection covers. Refer to the applicable
protection specification of the protection covers.
4.7.3 Temperature
When devices are in a 19-inch rack, make sure there is rack space between the devices to let
sufficient airflow. Forced airflow may be necessary to keep the temperature of the devices
below the maximum temperature (refer to section Product Technical Data, page 276). This
extends the lifetime of the devices.
4.7.4 Ventilation
Keep a good airflow. Airflow holes are in the front, right and left sides of all 19-inch devices
(for example, the central control unit and the audio expander).
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4.7.5

Acoustic feedback

Acoustic feedback ('howling') occurs when the sound of the loudspeakers or headphones in
the system is sent to the system again by enabled microphones.
2013.11 | V2.0 | DCN-NG_OM_V4.x
Make sure that the area is clean.
Make sure that the air is sufficient cool.
Make sure that there is sufficient lighting.
For table-top use, put the devices on a hard and level surface.
Use the devices on a horizontal position.
Put the central control unit at a minimum distance of 0.10 m from walls to let sufficient
air flow.
Use the devices always in a clean and dry environment.
Operation Manual
Conference System
Bosch Security Systems B.V.