Hi,
The ports on the enclosure support ADAT mode at sample rates up to 48 kHz and in TOS-Link mode, supports two-channel Optical input and output at sample rates up to 96 kHz. This port does not feature real-time sample rate conversion. The ports on the digital card support 48k only but can have hardware SRC for use with higher sample rate sessions. You can find this information in the 192 I/O guide available here:
http://www.digidesign.com/support/docs/
Thanks,
Digidesign Tech Support