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Bosch Security Systems | 04-2003 | 3922 988 43318 en
Digital Congress Network | Installation and Operating Manual | Chapter 4 - Central Control Equipment
en | 4-13
CCU Audio Routing Modes
4.9.1 Audio Routing INSERTION mode (FIG 4-9)
In the ‘INSERTION’ mode, the normal audio routing path in the CCU from added microphone signals
to the loudspeakers of the delegate and chairman units is interrupted to allow connection of an
external device for example - an audio mixer. The external audio device is connected between the
‘Line-Output’ and ‘Line-Input’ of the CCU.
FIG 4-9 shows the audio routing in the CCU and external device.
In the ‘INSERTION’ mode, a permanent audio channel is used for the ‘Line-Input’. Therefore the
number of available interpretation channels is one channel less than in the standard mode i.e. 10
channels instead of 11 channels in ‘Stand-alone’ and ‘Multi-CCU’ systems.
NOTES:
1. In INSERTION mode, recording of the ‘Line-Input’ signal via the recorder output of
the CCU is no longer available.
2. For recording the total audio signal (i.e. Floor + Line-Input) use an Audio Media
Interface unit LBB 3508/00 on channel 0 (see Chapter 4.11).
Installation:
To set the CCU for the ‘INSERTION’ mode DIP-switch ‘S9’ on the Trunk Communication
Board (TCB 4) must be set as follows:
FIG 4-9 ‘INSERTION’ mode
DIP-switch S9
Switch-2 Switch-3 Mode
Off Off Standard
Off On Insertion
DCN System
∑
∑
Line-OUT
Line-IN
CH.13
CH.0
CH.12
CH.13
REC. UIT
REC. IN
Volume CCU
Master volume
PC control
e.g. AUDIO
MIXER
Delegate/Chairman
microphones
Interpreter Headphone
Unit loudspeaker
Delegate Headphone
Equalizer PA
Local PA (MCCU)
Delegate unit
loudspeaker
(See Chapter 4.5.2 and Table 4-4:
