TM6800 and 6900 via ethernet, non linux receivers, very user friendly and HD
TM500 and 600 also via ethernet, these are linux based receivers, very powerfull machines with a near vertical learning curve like any other linux machine, but well worth putting in the time to get to know them
other TM models (1000 series, 5000 series) can CS using only certain patches and have to be connected to a PC with a null modem cable running sharing software, the 3000 series, while it has all of the menus on the receiver to enable sharing mode, i personally have never had any success with
hope this helps m8
as with most other companies that make receivers, the above can (and probably will over time) change