Question: Are the DM420, DM520 and DM4 digital voice recorder models compatible with any of the Olympus Transcription Modules?
Yes. Olympus has incorporated DM compatibility within thier Dictation and Transcription Modules using Release 5.0.11 ONLY. This release was made official in November and has been tested by the eDist technical services team in Austin TX
Verification Source: In-house testing & Digualle, Olympus Product Manager