Sorry, not familiar with phone systems.

What I know is that the the CTX is behind a Megalink connection managed by the provider, using Fiber Optics.

Looking in eManager, I did not see any specific setups in the T1 or the ISND PRI sections, so I would be inclined to answer POTS at this time. I will confirm with my Directors when he gets in on Monday, and will update.

Hoping this will help you guys some.