Reliability is great. But it's more understandable if you specify more about the system.

Reliable over what distance? In what conditions? Connecting with who? For what purpose?

There are lots of answers to the original question in this thread but each of the answers assumes different scenarios. So they only make sense if you know what scenario is being assumed.

I'm a Reliability Eengineer by job title and a radio geek since vacuum tubes. But I don't have enough info to give my answer to the question. I'm surprised at how many have.