Does anyone know if the ringing styles/cadences are the same on the merlin 820d2 as the 210,410, or 820 with Feature Pack 2?

Also, the 820d and 820d2 cards are interchangeable correct? Does anyone know where to get them for fairly cheap, right now ebay seems the best so far...

[This message has been edited by lupis52 (edited November 08, 2004).]