The Power Macintosh G3 comes with a modem slot on the Personality Card. This slot lets you install Apple's 56kbps modem card which is available as a build-to-order option. While this slot has the same dimensions as those found with Comm Slot II, it does not use Comm Slot II protocols. Comm Slot II cards other than Apple's 56kbps modem card will not work in the Personality Card's modem slot.