Digital Coax Coaxial S/PDIF to Optical TOSlink Audio Converter by Unique Products Online Plug your Digital Audio Coax in and get Toslink Digital Optical Out. Coax to Optical Digital This coaxial to optical converter will allow you to connect the coaxial digital audio output from your DVD, cable or satellite receiver to a Toslink digital optical input. Coaxial Digital Input via RCA jack Optical Digital Output via Toslink