The group call is the most important feature in professional radio communication. With one simple, push-to-talk button, a user is connected to many colleagues at the same time. It’s the ultimate in working together and is very easy to use in professional radio systems such as TETRA.
In contrast, in cellular systems, linking up several people to talk together requires setting up a conference call or using a push-to-talk app. Even then you’d only get basic group communication, little more than a simple walkie-talkie group call.
Here are five examples that plain push-to-talk can't deliver - but the best professional radio can.