I do not know this system.
But customer says there is a red alarm Light on it.
Another place I saw that the red light is always on.
This site I do not know if it just came on or has always been on.

Problem is - They cannot make or receive any calls but they can call Ext to Ext.
They say there is a dial tone but still can't call out and no calls come in.
Yesterday everything was working.

Any ideas?
Thanks

If CON is the opposite of PRO
Then what is the opposite of Progress?