The card may require DigiSystem Init 5.01r2 or higher. Current DigiSystem inits are required for cards with the new Onyx DSP chip rev.The Motorola 56301 DSP chip on MIX and d24 cards changed specs in the fall of 2000. New cards are identifiable by checking the mask stenciled on the 56301 Motorola chip. New cards are identifiable by checking the Mask stenciled on the 56301. "K30" (right below the "56301" on the face of the chip) indicates a new rev of the chip. In contrast, the previous version of the chip is marked "3F48S"