I guess, we used to take our advanced radios and communications trucks so serious though, in the 1980s.
A standard infantry platoon has many, many methods of communication even up to data access for dismounted troops. This kind of radio was basic, barebones, sometimes barely worked at all, especially in a dense urban environment. My PLT didn’t have these exact radios (we used ICOMs for this task), but the principle is the same. We actually weren’t allowed to say anything particularly sensitive over these radios due to their comparatively insecure crypto.