Portable radio station Radio stations in a portable case (radio go boxes) are particularly popular as emergency radio stations. In...

If a secure connection is important, this technology is the first choice. A satellite telephone provides a connection for voice and / or...

Emergency Position Indicating Radiobeacon Station (EPIRS or EPIRB) or Personal Locator Beacons (PLB), are small, portable transmitters...

Personal Mobile Radio PMR radios are popular, and not without reason. The devices work at approx. 446 MHz (thus in the UHF range). They...

Low Power Wide Area Network All possible sensors and actuators should be connected to the internet in the future. This then gives rise to...

Mesh networks for broadband communication A meshed network is understood to be radio services that automatically select the communication...

Morse code is still in use internationally after more than a hundred years. Many military personnel are still being trained in it. Due to...

Shortwave connections cannot guarantee a 100% connection due to the changing propagation conditions. Nevertheless, such devices are still...