This IVX 128 works fine except for delayed line ringing. Audible ringing is delayed 2 rings from the visual ringing.

Incoming calls show visual ringing immediately and this corresponds to the caller's first audible ring. But the set's 1st audible ringing is on the set's 3rd visual ring.

So the receptionist has only two rings to pick up the call before the four-ring vm grabs it.

PC download shows the CO line ringing table (Ring 1, 3, 5) is properly filled out, with sets on Ring 1.

Also, when audible ringing does start, the ringing pattern properly follows the ringing table, but it starts counting rings not from the first visual ring (which is the callers first audible ring) but from the callers 3rd audible ring/first local audible ring.

Is there some setting I have overlooked?

Thanks