Icarus

Yep, that's exactly where I got to. The ringing isn't the problem, being able to identify the call as coming from the DDI number is!

No, what I need is for the specific button to light up and ring on the selected phones when I get an incoming call on the DDI and be able to answer the call.

I've a bit of a puzzle to solve. I've got a Versatility with ISDN2 and an SN-DDI. I need this DDI to ring as an incoming line on a dedicated button on several V8 phones. The only way I can think of doing this is to program the DDI to ring a new ring group (2) then allocate a 'group' button on the phone (Gp2 had E20 removed and E30 added). Unfortunately, this isn't the way that the 'group' button works - it's to ring the group. Then tried to add an extension to the group (added E30 which is unused and removed E20) and program the key for E30. The key lights up red but of course the phone doesn't ring and the call can't be connected to. Anyone got any ideas?

Had a very similar problem on a 30 user system. It turned out to be a fault in one of the 8 port extension modules. Check this first, if not it's almost certainly to be the mainboard that'll need changing.