Hegel H80 and Sonos Connect

No sound when going from coax out of Sonos into the Hegel's coax input, The input works fine when fed by my CDP. Might optical cable work, or what might be the problem. Thanks.
It seems the Sonos is suddenly not working at all. I'm told Sonos and Hegel are compatable.
unplugged and reset the Sonos and all is well. I shouldn't buy gear that needs set up and has a menu.