Problems And Hints - Bosch DCN Next Generation Installation & User's Instructions

DCN Next Generation | Installation and User Instructions | Troubleshooting
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Problems and hints

Problem
You cannot start the central control
unit.
You cannot do the initialization of
the DCN devices with their buttons.
On two or more contribution
devices:
• The indicator rings of the
microphones come on as red,
and
• The LEDs of the microphone
buttons are off, and
• The microphone LED on top of
the loudspeaker of the
Concentus delegate units and
Concentus chairman units come
on as red.
The displays of the Concentus
devices show the start-up text.
You can operate the DCN devices
with their buttons, but the DCN
devices do not give an audio signal
to their loudspeakers or
headphones.
You cannot operate one or more
DCN devices with their buttons
and:
• The system gives power to the
trunks, and
• The devices do not give an audio
signal to their loudspeakers or
headphones.
Bosch Security Systems | 2007-02 | 9922 141 70525
Hint
• The central control unit is not connected to a mains power supply (refer
to section 8.5. 1 ).
• The DCN signal is re-generated too many times (refer to section 1.4).
• The trunk is too long (refer to section 1.4).
• The DCN signal is not re-generated each 100 m (refer to section 1.4).
• The contribution devices have the same address. Make sure that each
active device in the DCN has a unique address (refer to section 8.7).
• The DCN signal is re-generated too many times (refer to section 1.4).
• The trunk is too long (refer to section 1.4).
• The DCN signal is not re-generated each 100 m (refer to section 1.4).
• The audio routing mode of the central control unit is Insertion and you
did not connect a device between audio input 2 and audio output 2 of
the central control unit (refer to section 8.8.2.4).
• The DCN contains a defective extension cable. Find the defective
extension cable and replace it. The defective extension cable can be
anywhere in the DCN.
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