Ok, under the M170
. Problem is, Dell has confirmed there's an issue with 70tvd and newer modelshttp://www.notebookforums.com/thread135961.html
The R0897 does not
have S/PDIF, despite the description. It's a pure 7-pin s-video to composite adapter.
So, the P/N for M1710 is still unknown... The M1710 also does component
video through a similar adapter, which should also have a name...