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Untitled
editI added several references to modern equipment still capable of working with it. There are also many derived protocols, that not even always mention that they are based on the Sony 9-pin protocol, which I think is a good reason to keep the page. I further think the description of this protocol, the electrical connection and the way of controlling equipment are very useful for learning to understand how automated control of equipment in general actually works. Robijn (talk) 20:02, 23 May 2023 (UTC)