Hi Vincent,
That is unfortunate. Since the 315's are absolutely brand new to the market we did not know what version of firmware it would come it (and that it would be incompatible with IAP 104). Do you have options?
(1) Can we downgrade the firmware on 315 to a matching version that will work with 104?
(2) Can the 104s's form a separate cluster on the same subnet as the 315s?
Regards,
Jaiwant.