Sonos via Optical in on Dialog ?

[McChicken]

The optical output from Sonos will provide only the audio data to the Phantom.  I don't know whether the Phantom can auto-detect a digital input signal and start up automatically - maybe so.

As far as I know, both Sonos and Phantom use proprietary control protocols; in the case of Sonos (and I assume Phantom as well) this is over a network connection.  There is no reason to expect that they can talk to each other, so I think your hope of being able to control Phantom via a Sonos controller is unlikely to be realised in practice - sorry...  (As a Sonos user, I would love to be proved wrong on that point!)

Thumb,
Sorry for not making myself clear enough.
I like to use the Sonos as an DIGITAL AUDIO SOURCE ( Toslink Cable) and connect that to the Toslink connector input on the Dialog.
plz forget the Sonos Wireless system...
When Phantoms came out not even Devialet Support was sure if they DIRECT digital Toslink input on Phantoms would work, after that there have been some Firmware up-dates and YES a lot of users play music via Digital input directly into the back of the Phantoms. 
However if wanting Stereo then a Digital splitter is needed..I like to avoid that and use the Digital In ( Toslink) on the Dialog, setting up Spark recognizing a stereo pair of Phantoms as well as using a build in ( hopefully) Left-Right channel splitter.