Lazer Buwa offer clear two-way radio communication throughout your underground complex.

These systems can be tailored to specific site requirements to provide the best radio coverage and provide complete communications coverage for your site, including above ground surface coverage. Lazer Buwa offers design, supply, testing and commissioning of communication infrastructures for underground mines, tunnels, plants and buildings.

Lazer Buwa has partnered with some of the leading providers to offer you a wide range of system options.

Leaky-Feeder Systems

leaky feeder communication system consists of a cable run along tunnels which emits and receives radio waves, functioning as an extended antenna. The cable is “leaky” in that it has gaps or slots in its outer conductor to allow the radio signal to leak into or out of the cable along its entire length.



Because of this leakage of signal, line amplifiers are required to be inserted at regular intervals, typically every 350 meters, to boost the signal back up to acceptable levels. The signal is usually picked up by portable radios carried by personnel. Transmissions from the portable radios are picked up by the feeder and carried to other parts of the tunnel, allowing two-way radio communication throughout the tunnel system.

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Kutta DRUM® Radio Systems


Kutta DRUM® radios use parasitic propagation of a medium frequency signals to send voice and data communications in an underground environment.

These signals magnetically couple to metallic items commonly found in the infrastructure of a mine and allow for voice and data transfers several miles in distance.

When proper conductors are present, signals can travel over 5 miles in distance non-line of sight. These point-to-point communications can be carried by conductors such as: leaky feeder cables (powered or un-powered), phone lines, power lines, lifelines, metal pipes and tracks.

Conductors that are even buried beneath the earth can continue to transmit medium frequency signals in many scenarios, making the DRUM® Communication System the ideal redundant safety communication system for mine operators.




RAJANT Kinetic Mesh Network

Rajant provides a robust alternative to fiber and traditional single radio wireless systems using our multi-radio, multi-frequency BreadCrumb® nodes combined with the Poynting wide-band, bi-directional, circular polarized antenna system.

BreadCrumbs maintain multiple simultaneous connections between peers for inherent redundancy and can simultaneously send and receive information on different frequencies, mitigating issues due to interference, congestion, and equipment outages.

This also increases transceiver capacity to ensure low latency and enables mines to cascade BreadCrumbs together as many as 10 hops or more without throughput degradation.

Poynting antennas provide bi-directional coverage with dual-frequency Wi-Fi connections to assist in propagating signals around tunnel bends and to and from moving machinery.