Radio Frequency Over Fibre Optic Distributed Antenna System
OMU Optical Master Unit
The head end of a radio frequency over fibre optic distributed antenna system. It sits next to your repeater, turns its radio signal into light and sends it over optical fibre to the ORUs.
Good for: Data centres, campuses and tall buildings where one repeater has to cover several blocks or many floors.
Key specifications
- Job
- Radio to optical, feeds the ORUs
- Frequency
- UHF / VHF / HF / Customize
- Fibre
- 1310 / 1550 nm, 4 LC ports
- Distance OMU to ORU
- Up to 20-30 km
- Channel capacity
- Depends on your repeater
- Trunking (cluster) system
- Supported
- Size
- 2U, cabinet installation
- Power
- 230 VAC mains
- Protection
- IP30, for equipment rooms
- Approval
- SIRIM QAS type approved, repeater category, 400-450 MHz
From the manufacturer brochure. Exact specification depends on version, so confirm with me before ordering.
How the OMU and ORU fit together
Data centre coverage: when one repeater is not enough
Often used in: Data centres
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