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Old 03-07-2018, 8:33 PM
brent20 brent20 is offline
   
Join Date: Oct 2016
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The JSC did a podcast specifically on space communications. This may of interest: https://www.nasa.gov/johnson/HWHAP/can-you-hear-me-now

I believe they use a huge RTS Intercom Digital Matrix (What they call voice loops) and from there they get that up to the ISS.
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