I've only used s/pdif and bnc digital cables thus far. I need to go out of my Benchmark adc-1, back into my (soon to be purchased) MR816csx interface, via adat. Benchmark tells me that particular digital out is an adat optical.
I can get a good deal on a Planet Waves cable
DAddario ยป Planet Waves Custom Installation > Home Audio/Video > Digital Audio Cable, that I thought was an adat optical, only, the description reads that it is a toslink. I believe "toslink" is supposed to only be 2 channels. Can a cable described as "toslink" function, or be the same as an adat optical?