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DDS 5900 Digital Discussion System
The DDS 5900 Digital Discussion System is a conferencing solution with plug-and-play setup and online discus-
sion management. With excellent audio quality and programmable touch-button controls, compact microphone
units facilitate clear communication in large groups and meeting spaces. The system manages up to eight talkers
at a time and dedicates two channels for interpretation, supporting bilingual events without additional equipment.
The DDS 5900 Digital Discussion System is comprised of one central unit, the control browser, and discussion
units for up to 250 participants. Supporting multiple user types, a gooseneck microphone, loudspeaker, and control
buttons are combined in a compact discussion unit. With highly flexible layout options and a choice of tabletop or
flushmount units, the system seamlessly integrates into a wide range of professional environments, such as:
•Corporate meeting rooms
•City councils and regional government bodies
•Educational institutions
•Courtrooms
•Videoconferencing rooms
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Features
Clear, Natural Communi-
cation
DDS 5900 discussion units enhance group communication, allowing natural con-
versation to be heard in large meeting spaces. Gooseneck microphones provide
excellent speech isolation, while the LED light ring indicates who is talking. A 24-bit
digital audio signal is transported to each discussion unit for real-time monitoring
from the loudspeaker. Several microphone operation modes provide manual and
automatic microphone activations.
Sleek, Professional De-
sign
Modern, low-profile design integrates into a variety of spaces, from historic build-
ings to contemporary boardrooms. DDS 5900 discussion units are intuitive and
functional, reducing clutter and increasing tabletop workspace. Two model varia-
tions are available to support the needs of any event:
•Compact flushmount unit for permanent installation
•Portable unit for quick setup and easy removal
Flexible Setup and Easy
Installation
The DDS 5900 system uses a proprietary protocol to transport digital audio, control
data, and power over the same cable (shielded Cat5e). The system supports large
events of up to 250 participants, easily scaling with additional components added
inline for a simplified layout topology.
Remote Management For comprehensive system management, open the browser-based control app us-
ing a computer or tablet. The interface adds system configuration and discussion
setup capabilities, enabling an administrator to prepare the discussion with partici-
pant names and seat numbers. The chairman or moderator uses a dedicated page
for speaker management during the discussion. The system is also compatible
with Crestron, AMX, and other control systems. The CCU easily interconnects with
teleconferencing equipment and external audio components.
System Concepts
The DDS 5900 Discussion system is an important communication tool for meetings of any size. Participants use
the discussion unit microphone and loudspeaker to communicate using natural speech levels.
The Discussion Unit: A Personal Sound System
The DDS 5900 Discussion System improves communication amongst a group of people by combining the micro-
phone, loudspeaker, interpretation audio, and user controls in an integrated unit. When a participant speaks, their
voice is heard at the other units' loudspeakers. The DDS 5900 is a perfect solution when every participant is both
a talker and a listener.
In contrast, traditional sound systems support the communication of one or two speakers to a crowd of people. In
those systems, it is impossible to have the dialog required in a discussion setting.
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Discussion Participants and Roles
The DDS 5900 discussion unit is programmable to support different functions required by different people involved
in the discussion. For example, as the moderator of the discussion, the chairman has an extra control that immedi-
ately turns off all delegate microphones. In a typical event, there are three categories of participants:
The following is an overview of each participant role and how they function in a typical discussion.
Delegate (member, par-
ticipant)
The majority of participants fall into this category. The delegate role is for anyone
involved in the discussion that is not a chairman or interpreter. Delegates use the
discussion unit to speak and listen to other participants. Depending on the discus-
sion settings, the delegate may send a request to speak before the microphone is
activated by the Chair.
•Up to 250 participants are supported in the DDS 5900 system.
Chairman (chair, modera-
tor, president)
The chairman, or simply the Chair, is the moderator of the discussion. Typically
seated at the head of the meeting space, the Chair has the ultimate authority over
who is speaking. Using the browser interface, the moderator has ability to turn mi-
crophones on or off for specific participants, and view the order in which partici-
pants request to speak. Providing immediate control of the discussion, an 'all-dele-
gates off' button is available on discussion units programmed to chairman mode.
•There is typically only one chairman for each event, though more can be added.
Interpreter When an additional language is spoken in a discussion, an interpreter provides si-
multaneous interpretation using the discussion unit. Interpreters select from one of
two channels to transmit to other participants speaking the same language. This
system supports bilingual, two-way discussion, facilitating the back-and-forth com-
munication between delegates speaking two different languages.
•The system supports simultaneous interpretation for two languages
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Component Overview
The DDS 5900 Discussion System consists of the following components:
① DIS-CCU Central Con-
trol Unit
The central control unit (CCU) is the processor for the DDS 5900 system. It pro-
vides power and control to the discussion units, analog audio inputs and outputs
for external equipment, and a web server that hosts the browser interface for re-
mote system control. Each system uses a single CCU.
②Discussion Units Participants use the discussion units (DU) to speak and listen to other members of
the event. A microphone, loudspeaker, and channel selector are provided for each
unit. Units connect in series, simplifying setup by transporting power, audio, and
control data on the same cable. There are two models of discussion units:
DC 5980 P
Portable Discus-
sion Unit
All-in-one unit that sits on the table surface. It is config-
urable as chairman, delegate, or interpreter.
DC 5900 F Flush-
mount Discussion
Unit
The flushmount discussion unit installs unobtrusively into a
table or podium. The modular unit adds functionality de-
pending on the components. It is configurable as chairman
or delegate.
③Browser Interface The browser interface provides comprehensive setup and discussion management
for the DDS 5900 system. It opens in a web browser from a computer networked
with the CCU. Use the interface to manage microphones, assign names and seat
numbers to delegates, and advanced system configuration.
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Central Control Unit
The DIS-CCU Central Unit provides the intelligence for systems of up to 250 participants in the DDS 5900 system.
It processes audio and control signals from each discussion and interpreter unit, and distributes audio to other par-
ticipants for listening to the discussion.
System Hub
The CCU connects external equipment to the DDS 5900 system
When used with the DDS 5900 system, the DIS-CCU has the following features:
•Controls a system of up to 250 discussion units
•Transports secure audio signal with a proprietary codec algorithm
•Provides a web server for advanced control through a browser interface
•Supplies power for up to 50 discussion units
•Supports two (2) interpretation channels for bilingual discussions
•Provides eight (8) audio outputs to send interpretation or group channels to PA systems, audio mixers, audio
recorders, or a language distribution system
•Provides two (2) audio inputs for connecting wireless microphones, processed audio signals, an emergency
broadcast message (EEM), or music during meeting breaks
•One rack unit (1RU) size installs into a standard 19" rack
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DIS-CCU Hardware Description
DIS-CCU Central Unit
Front Panel
①Menu display A 2x20 character OLED-display enables system configuration without a computer.
②Navigation Buttons 5-button keypad for configuring the system without a computer.
③Power Button The power button turns on or off the central unit. All connected DCS-LAN units and
power supplies will automatically power on or off with the CCU.
•Green = powered on
•Red = powered off but connected to power supply
•Off = no power supply is connected to the CCU
Note: System settings are stored and persist through a power cycle.
Back Panel
④ Power Supply Con-
nector
Threaded connector secures to the PS-CCU power supply.
⑤DCS-LAN Outputs Four RJ45 jacks are available for connecting the microphone units, forming the
DCS-LAN. The DCS-LAN chain safely carries digital audio, control data, and pow-
er over the same cable. Use any or all of the four outputs for a variety of layout
configurations.
Important: Only connect DCS-LAN equipment to this output.
⑥Control Connector
(TCP/IP)
The RJ45 connector allows access to the built-in web application from a computer,
or for connection to a control system like AMX or Crestron .
® ®
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Back Panel
⑦Audio Outputs Eight balanced, male XLR connectors for connection to PA systems, audio mixers,
audio recorders, or a language distribution system.
⑧Audio Inputs Two balanced, female XLR connector for adding external audio equipment to the
meeting, such as wireless microphones, a teleconferencing system, processed au-
dio signals, an emergency broadcast message (EEM), or music during meeting
breaks. Input gain and volume are adjust from the CCU front-panel or web applica-
tion.
⑨Emergency switch
connector
Provides an emergency override signal in the event of an emergency. When the
connected switch is closed, the audio signal on Input 2 is distributed to all output
channels, overriding all other audio inputs.
Simplified Audio Diagram
DIS-CCU Audio Diagram
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Menu Navigation
The DIS-CCU provides controls from the front panel for system setup and configuration. Use the 5-button keypad
to navigate the menu and change settings.
The figure below gives an overview of the menu structure.
•Use arrow buttons to cycle through menu items
•Press enter (center) button to navigate to an editable field.
•Use up/down buttons to cycle through the available values
Menu Overview
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Discussion Units
Participants use discussion units to communicate with other members of the event. Connected in daisy-chain con-
figuration from the central unit, they transport digital audio, control signals, and power over a single cable. The
sleek, professional design and minimal cabling allows seamless integration into professional meeting spaces. A
DDS 5900 system supports up to 250 discussion units at the same time.
DDS 5900 Discussion Units
Primary functions of the unit:
①Microphone
for speech
②Speaker
for listening to the discussion
③Control Buttons
for microphone operation and interpretation channel selection
④Headphone Jack
for listening to an interpretation channel or the floor audio
⑤Base with RJ-45 Jacks
for power, audio, control transport
Model Variations
DC 5980 P Portable Discussion Unit
Sits on the tabletop without drilling or cutting the surface, and easily dismantles for system reconfiguration. Fea-
tures include an integrated speaker, rear-exit cable routing, and operation as an chairman, delegate, or interpreter
unit.
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