RBR50 Backhaul Status: Disconnected, Poor, Good, Any others?

[SteveL2018]

Firmware 2.1.4.16

So far for Backhaul Status on the Attached Devices page I've seen Disconnected, Poor and Good.

Does it get any better than Good?  Excellent?,  Outstanding?, Super Duper? etc.

I found nothing in the documentation on what status descriptions are possible.

Thanks,

[FURRYe38]

That is all.