Originally Posted By: wfaulk
Jack implies female, which makes me wonder how you know it has four connectors.


I'm in the UK. We often use the term "jack" for both ends. It is, as you say, a TRRS plug.

Quote:
As Tony says, it's almost certainly a proprietary RS232 serial cable for some device that has limited space for a connector.


Odd. I wonder what it's from, then?
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-- roger