VHF 136-174MHz Fiber Optic DAS Repeater for Railway and Transportation

Railway communication networks face unique challenges: hundreds of kilometers of linear infrastructure punctuated by tunnels, deep cuttings, and underground stations where RF signals simply cannot penetrate. Train dispatchers, maintenance crews, and station operators all rely on VHF radio for safety-critical communications that must work flawlessly at every point along the route. Our VHF Fiber Optic DAS Repeater addresses these challenges head-on, deploying a fiber-connected chain of remote units that deliver consistent signal coverage throughout the entire rail corridor.

The system's linear topology is purpose-built for trackside deployment. A centrally located master unit connects to the donor base station, then distributes optical signals to remote units positioned at strategic intervals along the route. Each remote unit—housed in an IP65-rated enclosure—withstands the vibration, temperature extremes, and humidity typical of railway environments, while fiber's inherent immunity to electromagnetic interference ensures signal integrity even adjacent to high-voltage traction power systems.

• Linear fiber topology designed specifically for trackside corridor deployment
• 10km optical reach connects centralized equipment rooms to distant trackside units
• IP65-rated remote unit withstands vibration, temperature swings, and humidity
• Ultra-low system delay (≤1µs) preserves real-time voice for dispatch operations
• EMI-immune fiber backbone operates reliably alongside traction power systems
• Remote monitoring via OMS Lite reduces costly trackside maintenance visits

Located in Guangming District, Shenzhen, Shenzhen A T N J Communication is a professional RF manufacturer with 16 years of experience in R&D, production, manufacturing, sales, and technical services. Our main products include Digital LTE/NR series repeaters, SDR core boards, passive devices, Digital DAS systems, and technical solutions for Public and Private (VHF, Tetra) network base stations and wireless frequency modules.

We provide OEM and ODM services for various RF projects, including wireless repeaters, multi-frequency DAS systems, remote network management center OAM, and equipment provision for indoor and outdoor signal coverage projects.

Our digital repeaters now support 12 subbands simultaneously with local and remote control and monitoring capabilities. These products are supplied to signal operators and communication integrators worldwide, providing signal coverage solutions for residential areas, office buildings, supermarkets, basements, and rural areas.

We have successfully introduced mature digital band-selective repeaters to overseas mobile operator markets. Our product field extends to Public Safety and Low Altitude Economic construction applications, including Public and Private Network Digital Multi-subband Repeaters, wireless signal repeaters, Integrated Base Stations, civil countermeasures, and phased array radar technology.

Furthermore, we have realized Digital fiber multi-frequency, UHF, Tetra, VHF, and Microwave frequency shift repeaters. As technology progresses, we continue to develop easier-to-use, more functional, and intelligent RF products. We look forward to collaborating with you to create a brighter future together.