I have a Zenith XBS344 DVD/VCR Receiver Home Theater that I purchased 4 to 5 years ago. I plan on buying a Westinghouse LTV-40w1 HDC LCD TV/DVD Combo. The only way to configure the audio output of the Westinghouse to 5.1 is to use the SPDIF RCA Coaxial jack. The Zenith has an Optical Digital Audio Input that appears to be a Toslink jack. Zenith Tech Support says that it is NOT a Toslink connection. I realize that I would have to purchase a Coaxial to Toslink Converter (plus compatiable cables). My concern is what is the difference between a Optical Digital Audio Input and a Toslink Input?