In ref to 902's comments, on the money! I see the problem as a transition from the generation of Comm techs of the past to IT people steering these discussions. Talk of Handie Comm and HT'S has been supplanted by mainstream consumer technology with reliability of nat. It's a passable consequence if your wireless device has catastrophic event now and again. Public safety obviously has zero tolerance for failure without potential loss of lives.
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Thank you. I'm one of those old-school radiomen who's desperately searching for his relevance over the next 20-something years, or however long I have left. I'm a little younger than most of the guys who are positioned to retire, so I went back to community college to learn this IT stuff, which came up independently of radio, but now seems to be what anything "technical" is thrown under. And, my impression of the IT puppies is that if it's not a software configurable black box module, it's icky and dirty, like a greasy diesel engine.
Anyway, moving forward from that, some things to keep your eyes on:
NFPA 1221 - not the force of law but a best practice standard that requires backups and redundancies, along with feedback. Can that be done in the IT realm? Sure. Is it in any of these products? Maybe. (I don't know).
NFPA 1802 - an emerging standard that may specify certain user interfaces and device characteristics, whether they are with legacy radio technologies or IT-based technologies. That COTS device might be a nifty and elegant thing for day workers and admins (thinking about some folks at a meeting in California punching their department back east on their phone and monitoring talkgroups like their radio worked all the way out there), but on the line, maybe not so much.
I hear feedback from young field personnel (I was a NJ MICP 32 years ago with a three-digit certification number, and a paramedic across the river for even longer...) that traditional radio equipment lacks the utility of a common smartphone. Maybe so. But I reply, "the smartphone should never be better than your training, situational awareness, and field decision-making capabilities," and "the smartphone needs to be hardened up and failure resistant."
The 5G solution for talking through a wall to another subscriber is still network dependent instead of network agnostic. My opinion (both as a geezer and a radioman) is that IT doesn't necessarily seek the simplest solution. Those simple solutions are usually the most failure resistant.