For some reason port 0 on my FXS card does not provide dialtone. The settings on port 0 and port 1 are identical and I have swapped out analog phones
I can call the phone attached to port 0 from port 1 on the same card.
The LED associated with port 0 comes on when the phone goes off the hook.
On port 0 the phone goes off hook, on hook, then off everytime I pick up the phone.