Is AT&T a Good digital cable connection ?

I've found AT&T ST to always sound equal or better than coax or aes/ebu. If the DAC and Transport are designed around this method of data delivery, that's what will sound best. I think a lot of the newer gear doesn't include it do to cost and the fact that aes/ebu has come a long way. Plus I2S seems to be the new "hot" item. The one reward that I have found, is that it does not have to cost you an arm and a leg for a "glass" cable. I had one made for me at my local supplier for less than $15. You just need to know which fiber, single or multi mode. It's all in the termination of the ST connector. I've compared it to the D-60 and Orchid. It equals the $350 Orchid at a fraction of the price.