I have a Quadro4X running 5.3.5

Recently (a few days ago) we seem tro have lost all of the FXO lines.
System Diagniostics/FX tests return
"FXO Tests: Test failed, no active FXO line found Error occured. Test is not completed."

I am away from the office and logging in remotely.
My trusted assistant has connected a std phone and tells me that she can dial out "no problem".

I am setup to dial '9' to get FXO 1
My teleco is XLN

Any help greatly appreciated.