If they press the Intercom button and dial the same number as you programmed - Does it Work?
That is the best test for it.

Does this have PRI or Analog lines?

Is the programming for that extension, set for PRIME as I/C - for PRI? (and have destination codes not line pool codes)
Is the programming for that extension, set for Line Pool - for Analog lines?


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