Comment Re:Why emergency voice and not data in general? (Score 1) 54
My first guess is because sending voice is a priority, whereas sending data can come later.
In an emergency, people can use voice to coordinate efforts, report and transmit information, describe situations, etc. It is also extremely low bandwidth.
When you start transmitting data, the bandwidth requirements go up. Consider way back in the beginning, the lowly 300-baud modem. The same carrier that could transmit voice with ease, was struggling with sending a single picture. But once you open the floodgates of wanting "data", the problems ramp up. Why should I only be able to talk when I should be able to:
- Video chat
- Transmit live images
- Give large amounts of recorded data (medical information, weather, tactical reports, you get the idea)
It also means higher hardware requirements. Voice means you need a microphone, maybe a tuner, and a way to convert the signal to an audio frequency. When you add video that means also including cameras and screens to display information. You'll probably want a more sophisticated means of inputting data, like keyboards or USB slots. And it goes on and on.
And before you think, "I'll just use my cell phone as it can do all that and more," the emergency he's referring to is likely something more catastrophic than a down cell tower. Think **ALL** cell towers are down. Think major earthquake. Think tsunami.
Are you able to open your cell phone and rewire to something other than cell technology? Probably not. But I could take a battery, some wire, and a speaker and get a working AM radio receiver.