if you are unable to have the computer next to the interface board/repeater, you can run a 50 foot db9 cable. one of my testers has does this and it works with no problems! however make sure you don't run the cable next to LED lights or Fluorescent light!! this could make noise on the audio/sound!
here is the cable he is using:
https://www.amazon.com/YCS-Basics-Seria ... 67301&th=1
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