This solution is designed for sectors that require voice and data communications, such as public safety (disaster communications, police, and fire services), railways, subways, airports, and plants. It enables rapid response to emergencies and delivers reliable, stable wireless communication services based on standardized technologies. Drawing on the expertise and know-how of engineers and researchers with extensive experience in wireless network design, deployment, and maintenance, SMEC delivers end-to-end services ranging from RF engineering and design to system supply, deployment, and optimization, as well as dedicated after-sales support to maximize customer satisfaction.

Solution
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Digital TETRA TRS
- Switching equipment
- Base station equipment
- Terminal equipment
- Gateway equipment
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Digital Mobile Radio
- Tier - I
- Tier - II
- Tier - III
Applications

Competitiveness in Digital Wireless Communications
- Over 20 years of expertise in wired and wireless communications
- Technical personnel with more than a decade of experience in wireless communications
- Experienced personnel with a proven track record in public safety, railway, and metro wireless communications projects
- Patents and R&D capabilities in wireless communication equipment
Specifications
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Category TETRA TRS Digital Mobile Radio Technical standard European Telecommunications Standards Institute (ETSI)) European Telecommunications Standards Institute (ETSI) Access method 4-TDMA 2-TDMA Channel spacing 25kHz 12.5kHz Frequency bands 380 - 400MHz
430 - 470MHz
800MHz136 - 174MHz
350 - 400MHz
400 - 470MHzModulation π/4 DQPSK 4FSK Voice coding ACELF SELP Security AIE, E2EE AES, E2EE Data transmission rate Max. 28.8Kbps Max.9600bps Services - Group/individual calling
- Telephone calling
- Emergency calling
- 0.3 sec call setup time
- Dynamic group assignment
- Max. 40 W output (base station)
- Priority calling
- Call intrusion
- Ambient listening
- Status messaging
- Text messaging
- Packet data services
- Group/individual calling
- Telephone calling
- Emergency calling
- 0.3 sec call setup time
- Max. 50W output (base station)
- Priority calling
- Status messaging
- Text messaging
- Packet data services
- Tiers 1, 2, and 3
Applications Public transportation
(railways, subways, airports)
plants (oil, gas, power IT)Public transportation
(railways, subways, airports)
small businesses (distribution, manufacturing)
Network Diagram


