Here's the diagram V.H. MacDonald used in his 1979 article for The Bell System Technical Journal, "The Cellular Concept." What it depicts is the basic layout of a mobile phone network.

Marc Seelenfreund, CEO of Siyata Mobile, commented, "Our SD7 Ultra series 5G cellular radio handsets represent the next generation of mission critical cellular devices for first responders ...

* Next generation push-to-talk over cellular SD7 device offers a far superior solution to competitive land-based radio technologies * SD7 targets the multi-billion-dollar first responder and ...

InnoPhase Hermes TWO Digital Radio Block Diagram - A revolutionary development enabling an extremely efficient system implementation for cellular network radio units.

Standards for cellular radio-access networks known as Open RAN could make deployment of 5G and other cellular networks less expensive and result in faster innovation of features and services.