How to detect whether Zigbee or Zwave radio is "offline"?

Is there a command or function to detect the state of either of the radio's on my C4 ?? (Commands or special actions etc)
Being outside the US, I have dual USB radio's, 1 for each of Zigbee and Zwave.

My Zigbee network was showing as "offline" this morning, which I've resolved by safely rebooting my C4 hub but this lead me to wonder if there's a way to detect the state of each radio as I could then automate if it happens again.
FYI: I put the "gone offline" down to the big electrical storm we had last evening.