Whether it is an electric power plant, an assembly plant, a mining pit or a chemical industry plant, it is necessary before taking any decision about future professional radio system, to work out in detail:
– functional communications at the enterprise in terms of interaction of related services;
– identify typical scenarios and the number of subscribers involved;
– evaluate negative or disaster scenarios and the number of subscribers involved;
In addition, it should evaluated what functionality of the communication system, both new or reconstructed, is mandatory:
– full integration with a telephone network with duplex communication;
– group interaction of subscribers;
– independence from public networks;
– guarantee and speed of call set-ups;
– priorities of administering subscribers with the possibility to terminate less valued call;
– getting of location data of subscribers during a call or stand-by;
– recording of subscribers’ conversations and network statistics;
– use of equipment in harsh operating conditions;
– ensuring long working shifts of subscribers;
– ensuring voice transmission in harsh noise environment;
Obviously a digital communication system is a solution, which can implement one or another functionality, or work out all tasks at once.
Several solutions are available on the market based on the TETRA, DMR (Digital Mobile Radio) standards, as well as the proprietary NXDN protocol. In some cases, for professional radio system, skillful sellers offer the idea of using PTT over Cellular with the possibility of providing smartphones to employees instead of specialized terminals.
However, some functions can only be implemented while using TETRA technology, for example, seamless handover, 15 priority levels, adaptive (automatically adjustable) power of subscriber radios, and a full range of supported services. This circumstance explains the dominant position of the TETRA standard as a defining technology for professional radio communications in many enterprises and factories in various segments of the economy.
There are several active manufacturers of TETRA equipment, but only DAMM Cellular Systems A/S has been able to offer users a fully IP based solution capable of operating on low-cost communication channels with hundreds base stations. In addition, DAMM BS421, BS422 base stations can be placed directly next to the antennas without special room, unlike base stations from other manufacturers and that saves up to 20% of the base station budget.
In addition, the new BS422 base stations are released not only for the 400 MHz band, but also for the 136-174 MHz band if communication is required in remote areas.
Also, a unique feature of BS422 is the ability to increase the throughput (channel capacity) without hardware expansion – up to 4 TETRA radio carriers per 1 device.
Types of calls and services supported in the DAMM TetraFlex system:
– individual call (subscriber – subscriber), including in telephone mode;
– group call (subscriber – group of subscribers);
– telephone call (subscriber – telephone network);
– emergency call;
– packet data transfer;
– transmission of text messages with notification;
– setting priorities for a certain category of subscribers;
– organizing queues during peak hours;
– limiting the duration of calls during peak hours;
– dispatching communication;
– determination of the subscriber’s status (on / off / busy);
– identification of the caller’s number;
– dynamic regrouping (DGNA);
– Authentication by TEI;
– protection against external intrusion into the system;
– call forwarding on busy / no answer / no availability;
– packet data transmission in multi-channel mode (similar to GSM GPRS)
Advantages of the applied solution:
– low power consumption;
– all-weather enclosure IP65;
– without single point of failure multi-zone infrastructure;
– high call set-up speed – less than 0.3 s;
– independence from public networks;
– a wide range of functionalities and services;
– TETRA digital standard;
– highest frequency efficiency (4 logical channels on one carrier frequency with a width of 25 kHz);
– guaranteed voice quality, even in the extreme audio environment;
– availability of the talk channels at any load;
– integration into a private telephone network via IP or ISDN protocols with support for direct numbering (without additional dialing);
– protection against external intrusion into the system;
It should be noted that the implementation of solutions based on TetraFlex equipment allows increasing the economic efficiency of individual divisions of the enterprise. Terminals of various manufacturers can be used as subscriber radios.
Our company recommends SEPURA STP90x, STP92x, SC20x, SC21x as ordinary terminals, and as explosion-proof ATEX STP8x0, STP8x1, IP67 or IP68 encapsulation.
Special gateways can be used for integration with the customer’s existing analog radio networks. For communication with other TETRA networks, the ISI intersystem interface can be used.
If it is necessary to expand the radio coverage area, it is possible to use TETRA repeaters to provide radio coverage for buildings, tunnels and constructions with low electromagnetic penetration: basements and semi-basements, underground structures. Providing radio coverage in hazardous areas is possible with the help of special repeaters from BHE with ATEX explosion protection II 2G EEx d (ia) IIB T4.
Typically it is advisable to use following equipment:
DAMM node – consisting of several BS421 or BS422 (transceiver, power at the antenna connector up to 25W), and up to 2x SB421 or SB422 (control and switching unit with built-in uninterruptible power supply);
DAMM Dispatcher is a dispatch software package with a localized interface;
DAMM LogServer – a complex for recording negotiations and statistics;
VoIP-E1 – media gateway with E1 PR ISDN EDSS1 (or SS7) interface;
SEPURA STP9x, SC20x, SC21x, STP8x – TETRA portable radios;
SEPURA SRG3900, SCG2229 – mobile or fixed TETRA radios.
Repeaters from BHE – BRTL35, BRTL31.
List of industrial projects with DAMM infrastructure:
1. Power & Energy
Sira-Kvina Power Company Norway
DONG Energy Denmark
Dixie Electric Membership Corporation (DEMCO) USA
Leningradskaya Nuclear Station – energy Russia
PGNiG Termika Warszawa Poland
Fotovoltaic power plant – ENEL Brazil
TETRA coverage in Asco and Vandellos nuclear plants Spain
Kurskaya Nuclear Station Russia
QLD State Government – Stanwell Power Plant Australia
EDF Polska Rybnik Poland
Doel Nuclear Plant Belgium
NSW State Government – Earring Power Plant Australia
AES Poverplant Bulgaria
Dachau Citycom Germany
Stadtwerke Neuss GmbH Germany
Kaliningradskaya TEC-2 Russia
Stadtwerke Flensburg Germany
Ontario Power Generation Canada
Abengoa Bioenergy – Europoort Rotterdam The Netherlands
GDF SUEZ Power Plant The Netherlands
E. ON Energy Sweden
2. Plants / Factories
Wireless Net Norway
Chelyabinsk Zink Factory Russia
Janssen Biologics – Leiden The Netherlands
Friesland Campina – Veghel The Netherlands
Salmar / Nutrimar Norway
Volgograd Pipeline factory Russia
Aluchemie – Botlek Rotterdam The Netherlands
Kverneland Group Norway
Schlumberger Norway
AIRBUS Operations Bremen Germany
AIRBUS Operations Hamburg Germany
Infinion Germany
SSAB Oxelösund Sweden
METSÄ FIBRE-Äänekoski Finland
Korean Battleship Korea
Jotun Norway
Bayer Schering Germany
Bosch Halbleiterwerk Germany
INA Scheffler Germany
Heerema Marine Off-shore – Leiden The Netherlands
Lanxess Rubber – Zwijndrecht Belgium
METSÄ FIBRE-Simpele Finland
Volvo Cars Sweden
Binderholz Germany Germany
Paulaner Brewery Germany
Basell Benelux The Netherlands
Lyondell Bayer Manufacturing – Rotterdam The Netherlands
Monument Chemical of Antwerp Belgium
Nordic Refrigeration and Electrical Services – Whyalla Australia
AMV Bremen Shipyard Germany
AMV Shipyard Germany Daimler Germersheim Germany
Daimler Wörth Germany Stahlwerk Dillinger Hütte Germany
Thyssen Krupp Steel Germany
BillerudKorsnäs Karlsborg Sweden
Metsä Board Husum Sweden
