ARMTEL ARMT.665200.003UM, Руководство пользователя

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DCN-2 CENTRAL EXCHANGE
User Manual
armtel.com
page
5/44
info@armtel.com © Armtel
ENG
1 DESIGN AND DESCRIPTION
1.1 Product description and operation
1.1.1 Features
The DCN-2 Central Exchange is intended for use as a central exchange as part of a digital
system of loud-speaking operational and technological communication and loud
notification DCN, at industrial and transport enterprises. DCN communication systems
manufactured by Armtel LLC, built with these products, provide simplex communication
between loudspeaker subscriber devices manufactured by Armtel LLC, duplex
communication with telephony subscribers, search communication, and emergency loud
notification.
DCN-2 can be used in metallurgical, chemical, oil refining, nuclear (including nuclear
power plants), gas, and oil-producing industries and similar to them in terms of application,
as well as in transport.
The DCN-2 Central Exchange is installed in telecommunication cabinets or racks located
in hardware, control rooms, or office premises and operates in the temperature range from
minus 5 °C to plus 55 °C with a relative humidity of up to 80%.
DCN digital communication system has a flexible distributed structure, where individual
stations are connected in the unified network by E1 digital streams. DCN communication
system station (or central station), in its turn, consists of DCN-2 central exchange unit or
DCN-Q4E switching processor module, to which DCN-16U and DCN-15A subscriber
exchanges equipped with digital or analogue subscriber interfaces are connected through
E1 stream. Such architecture enables to create large, territorially distributed communication
systems with minimum costs for central equipment and cable infrastructure.
DCN-2 is a compact central exchange of the DCN system. DCN-2 central exchange is
built by a modular approach and can be equipped with one to four boards of 4Е1 DCN-2
modules. Each 4Е1 DCN-2 module provides generating four E1 streams, each of which can
be connected to a DCN-16U or DCN-15A module with 15 digital or analog interfaces,
respectively. Thus, the maximum capacity of DCN-2 central exchange is defined by the
number of installed modules 4E1 and can comprise up to 240 subscribers.
To expand the subscriber capacity and communication with other systems, it is possible
to connect to DCN-2 other DCN-2 central exchanges and/or DCN-Q4E. In this case, inter-
switch protocol Armtel DSS is used, providing fully functional communication between these
exchange units. E1 streams can be also used as ISDN PRI lines for communication with
external telecommunication systems or for the connection of multichannel communications
recorders. The modules of the IP gateway, providing communication with various IP devices
can also serve as the stations of the DCN system. In order to improve PA quality, the