Filter
Top Products
DCN Next Generation 2.40 Release Notes en | 13
Bosch Communications Systems | 2007 March
10 Release 1.00
10.1 General
10.1.1 Release Date
June 15
th
2004
10.1.2 Firmware/FPGA versions
Product
FPGA SWA SWB
LBB 4100 1.00 1.00.0552 2.10.1402
LBB 4112 -- 1.3 --
LBB 4120 1.0 1.00.0552 --
LBB 4124 1.0 -- --
LBB 4402 -- 1.00.0552 2.10.1402
10.2 Errata
10.2.1 Audio Expander: not possible to disable
audio outputs using input contacts
In paragraph 10.3.5 of the Installation and User
Instructions is described that the audio outputs 1 to
4 can be disabled by closing respectively control
input 5 to 8. This function is not supported. However
disabling audio inputs 1 to 4 by closing respectively
control input 1 to 4 is supported.
10.2.2 Audio Expander: output range 12 dB
In paragraph 10.7.7 of the Installation and User
Instructions is the output range specified as 30 dB,
while the output range is 12 dB. Table 10.3 of the
Installation and User Instructions represent the
correct values.
10.2.3 Audio Expander: power consumption 7.6
Watt
The power consumption of the LBB 4402/00 Audio
Expander is 7.6 Watt instead of 5.6 Watt. Add
power by using a Network Splitter (LBB 4410/00)
with an external power supply in case the power is
insufficient.
10.3 Known limitations
10.3.1 System: reset of units after connecting
new units to a trunk
When a Channel Selector, Interpreter desk, Trunk
Splitter, Tap-off unit or Extended power supply is
connected to a trunk, which is connected to the LBB
4100 Central Control Unit, it can happen that all
units in that same trunk reset. After reset the units
come back to default settings. The units in the trunk
will not reset if a unit is connected to a Tap-off outlet
of a Tap-off unit.
If it is important that the channel selectors are not
reset to default in above described situation: use
the auto restore function of the channel selector.
See the Installation and User Instruction for how to
set the auto restore function.
If it is important that you can connect and replace
each unit during operation, without the above
described reset behavior: power the units with the
LBB 4106 Extension Power Supply Unit. The LBB
4106 Extension Power Supply Unit is less prone to
the inrush current.
10.3.2 System: noise during system start
During system start up noise is heard for a
maximum time of 30 seconds. The noise is heard
from the headphones connected to the channel
selectors and interpreter desks and the loudspeaker
of the interpreter desks.
10.3.3 Central Control Unit: fault contact closed
despite system is ok
When the system is initialized for four times, the
fault contact is activated, while the system works
properly. Switch off the CCU in order to reset the
fault contact.
10.3.4 Audio Expander: not more than one
input used for floor insertion
Undefined behavior occurs if more than one audio
input is used for floor insertion per system. Use not
more than one audio input for floor insertion.