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Digital Congress Network | Installation and Operating Manual | Chapter 11 - System Set-up and Operation

en | 11-2

Setting up a stand-alone system

11.2   Setting up a stand-alone system

The Central Control unit, in stand alone systems enables four basic conference procedures to be   
conducted:

•

Microphone management using various microphone operating procedures,

•

Voting procedures using the basic parliamentary voting procedure,

•

Interpretation facilities,

•

Intercom to the Intercom Operator.

The programming of the interpretation system (i.e. interpreter desk) in a stand-alone system is done 
manually (see 

  “Programming the interpreter desk”).

11.2.1  System mode selection (Multi-CCU LBB 3500/35 only)

Refer to 

 Single or Multi-CCU mode can be centrally selected using Multi-CCU software 

package LBB 3586. Using the ‘System’ mode push-button, the Multi-CCU LBB 3500/35 can be 
selected for use in Single mode if the LED indication for Multi-CCU mode is seen to flash.

11.2.2  Microphone control modes

The CCU in stand-alone mode, offers three microphone operational modes:
•

‘Open’,

•

‘Override’,

•

‘Voice activation’.

In each mode of operation, the maximum number of active microphones (Active Micro’s) that can be 
switched on at the same time during a discussion, can be assigned.
To select the number of active microphones, press the ‘Active Micro’s’ button, its LED 
corresponding to the chosen number (1, 2 or 4*) will illuminate.
* The number of active microphones available for selection in Voice activation mode is (2 or 4).

1. ‘Open’ mode

When the ‘Open’ mode is selected, delegates activate their microphones by pressing the microphone 
button on their delegate units. The number of delegates permitted to speak at the same time is 
limited to the number of active microphones selected. This means for example, - that if 4 Active 
Micro’s have been selected and four delegates are currently speaking, no other delegates may join in 
the debate. If a fifth delegate wants to join in the debate, this delegates joins a ‘Request-to-speak’ list 
However, if one of the current speakers switches his microphone off, the next delegate to switch on 
his microphone can join in the debate.

The maximum number of delegates in the Request-to-Speak list is 20.

2. .‘Override’ mode

When the ‘Override mode is selected, delegates activate their microphones by pressing the 
microphone button on their delegate units. If the number of active microphones is four and the 
number of current speakers is three then the delegate can join in the debate without interrupting the 
group of speakers. However if the number of current speakers is four and a new delegate now 
presses his microphone button to join in the debate, the microphone unit of the first speaker in the 
group will be switched off (FIFO First-In-First-Out), allowing the new delegate to join in the 
discussion. Using the override mode, no ‘Request-to-speak’ list is available.

NOTE: 

In ‘Open’ and ‘Override’ mode the chairman can, at anytime, switch on his micro-

phone.

3. ‘Voice Activation’ mode (Single CCU systems only)

When the ‘Voice Activation’ mode is selected, the delegates’ microphones are activated when spoken 
into. However, its light ring indicator is not functional in this mode (*default).  The number of 
delegates permitted to speak at the same time in this mode, is limited to the number of active 
microphones selected (2 - 4 only). * The default setting can be changed, see 

FIG 11-2

CCU (version illustrated LBB 3500/35)

LED
LED

LED

Push-button

Push-button

LED
LED

LED

LED
LED

LED
LED
LED

Push-button

Push-

Applicable to:
LBB 3500/35
only

button