User Guide
DVS-21
02/2018 • V.1.0 • L. Wolle
© 2017 ProCom
®
Professional Communication & Service GmbH • Technical changes reserved.
1 Glossary
Audio channel (PCM bus audio frequency channel)
Announcement to a group of intercom stations (members respond via intercom)
Everybody listens to everyone (conference). Switchover to selective call mode is
configurable.
All technical equipment for recording or displaying of voice or controlling information is called
device. External devices are for example call stations, loudspeakers, signal lamps or acoustic
enclosures of thirdparty suppliers. Internal devices are functional units on modules or the
CPU itself. This includes voice storage, tone generators and relays.
The source is the device which initializes a voice connection or a controlling function.
The destination is the device which is the target of a voice connection or a controlling
function.
Modules are printed circuit boards. The modules are inserted into the system rack
A single interface of a module is called a Port. Modules normally have 1 or 4 interfaces
(ports)
This term originates from intercom technique and describes a well-defined interconnection of
two members. Derived from this, all the well-defined control information that an exchange can
send or receive is called "lines".
A Line has either status 0 or 1. Per Port, 120 omnidirectional lines are supported.
Lines can be realised either as a switching voltage (analog technique) or as a data signal
(digital technique), depending on the module type. That is, a Line describes the exchange of
information with external components.
Voice connections and controlling functions are programmed by using the addresses of the
involved devices (source and drain). The address of the device is identical with the address
of the interface (Port) of the module at which it is connected or it is internal assigned.
The intrasystem addressing follows the scheme:
M.P.L (Module.Port.Line)
Special lines are specific lines using specific controlling telegrams. Basically they are
transmitted as a single line. They are supported only by a few programs to extend the
transmission of controlling information on the own long distance lines.
A Flag is the internal counterpart of a Line and provides an internal memory cell for the
exchange of information between programs.
A Flag has either status 0 or 1. 254 Flags are available per System.
Moreover, there is more information stored internally like audio channels, program identifiers
and internal communication information.
Flags are comparable to markers in process control technology.
The following rules apply to every program:
Flag OR activates the program
Flag NAND suppresses the execution
Flag (OUT) is activated if the program is activ
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