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Danish Interpretation Systems Technical Specifications
Printed in Denmark
12
4 DCS 6000 Messages
The RS232 binary protocol is used to transfer DCS 6000 system commands between the CU and the
external control unit. General definitions for the communication are described in sections 3.4.3 and
3.4.4. This section describes the details for the commands that can be sent via the RS232 protocol.
4.1 Addresses in the DCS 6000 system
Units, connected to the CU and provided with ability to initiate communication in the DCS 6000
system are assigned unique addresses. This goes for microphone units, interpreter sets and for external
control units as well. The CU is responsible for assigning addresses to various units.
Addresses are assigned in a random order at the first power up of the CU.
In order to obtain an address, an external control unit must pass through a registration. See section 5.2.
External control units are assigned addresses in the range 3900-3999 or 4040-4049.
Unique addresses allow the CU to send control messages directly to a single unit. Furthermore, it is
possible for the CU to distinguish the sender of a control message from all other unit by means of the
unique address.
4.2 Group addresses
All messages sent from the CU is either directed at a single unit or at a group of units identified by a
group address. The group addresses that the external controller is a member of is:
Group Address
Comments
All units 4000 The external unit is always a member of this group
Control Units 4013 The external unit is always a member of this group
An external control unit must react only upon a control message carrying either the unique controller
unit address or one of the above group addresses.
4.3 Messages from the external unit to the CU
The messages that an external control unit can send to the CU when the binary interface is in the
microphone control mode are divided into three groups:
• The EXTERNAL_CONTROL_GRP group consisting of messages to do with the registering and
monitoring of external control units. The value corresponding to EXTERNAL_CONTROL_GRP
is 27.
• The EXTERNAL_AUDIO_CONTROL_MU group that contains messages for controlling the
volume controls of the CU. The value corresponding to EXTERNAL_AUDIO_CONTROL_MU
is 28.