Digital Intercom System (with ISDN telephony, PA system support)

• DCN application
• Appearance and overall dimensions
• Supplementary equipment of DCN16U
• Interconnection into the network
• Autoinformator module
• Administration software
• Specification and technical data

DCN Communication System purpose:

Switchboard DCN v1.1 is used:

• for arrangement of operative-dispatch communication;
• for arrangement of loud-speaking communication and announcement;
• for operative communication with workshops with dangerously explosive and/or chemically aggressive manufacturing environment;
• for operative communication with cranes and stackers;
• for communication with radio subscribers;

• arrangement of simplex loud-speaking communication between subscribers' units;
• possibility of individual call of any subscriber or subscriber group (for devices with a dialer);
• individual announcement of subscriber via loud-speaking communication;
• zone (group) announcement of subscriber via loud-speaking communication;
• free subscriber numbering;
• priority subscriber call order;
• possibility of arbitrary priority assignment;
• recording of speech communication into autoinformator and its control playback;
• manual or automatic broadcasting of alarm signals, messages recorded into autoinformator;
• system local monitoring, diagnostics and configuration from administrator workstation;

Each DCN switching point is a compact digital switch with 16 ISDN customer sets with U-interface and 4 E1 ports for networking. Up to 4 of such base switchboards can be interconnected forming a uniform system with capacity of 60 subscribers with non-blocking switching field. At that the territorial location of base switchboards is not important, any types of cables and standard networking equipment can be used for interconnection.

Simplex intercommunication devices in desktop protected case can be connected directly to DCN subscriber sets at the distance up to 6 km. Built-in phantom feeding scheme enables connection of a pair of subscribers at the distance up to 3 km. To improve the communication quality the extended bandwidth 6.8 kHz, as compared with telephone exchange subscribers, is applied in switchboard DCN v1.1. Special analogue subsystem module allows to connect different analogue devices to digital subscriber interface, such as: amplifiers, including ones with load switching relay, lines of radio translation and Civil defense Emergency Control Ministry, fire and burglar alarm systems, analogue intercommunication devices, radio terminals, outdated loud-speaking communication systems and others.

Appearance and overall dimensions of DCN16U base unit

DCN16U switchboard base unit is a standard unit with the height of 1 HU for mounting in 19' telecommunication cabinet.

Following devices are located on the casing:

- 64-terminal connector, DIN41612 type, for connection of subscriber's unit cable (main distribution frame for subscriber lines) - terminal block for phantom feeding supply to subscriber's unit - terminal power connector of switchboard for supply voltage +48 V - fuse block: power supply of switchboard +48 V and subscribers' units - chamber for autoinformator module mounting (closed with blank cover)

Connectors and control units:

• 'Ctrl' - connector RJ-12 for DCN16U switchboard connection to network switchboard DCN v2.0, bus USB v1.1;
• 'PRG' - hidden button for switchboard software updating (Firmware);
• 'RST' - reset button;
• 'TDM' - connectors of TDM-flows 1-4 (RJ-45), for direct interconnection of DCN16U switchboards;
• 'COM1' - connector of RS-232 interface for connection of personal computer for system diagnostics and configuration;
• 'COM2' - connector of RS-232 interface for connection of personal computer during updating of built-in software;
• 'MMC/SD card socket' - designed for inserting MMC/SD card. Suitable for cards with capacity from 16 to 512 MB;
• 'MMC to Flash' - button for configuration data loading from MMC/SD card to switchboard's EEPROM;
• 'Flash to MMC' - button for configuration data roll-out from switchboard's EEPROM to MMC/SD card. It is designed for operational storage of current switchboard's configuration;