This is a weird one. Have an IPT phone (2020-SD) that is programmed to an extension on the main node. User goes off hook or a call comes to the phone and you get no dial tone or ringing. The buttons light up and he can make calls fine. Just gets no dial tone when off-hook and no ringing when a call comes to the phone. There are 14 other IP phones programmed in this node and they are working fine!

Now, the same phone programmed to an extension on the 2nd node does have dial tone and ringing when a call comes to it.

This is a CIX670 with 2 nodes.

What am I missing here?