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It all comes out to distance and cost.
So what is the distance we are talking about? both ways can send info almost at the same speed, so you are left with the obsiticales that are on the way and can lower the IR and make it useless.
when you are talking about telemetry i think you mean large distances so, you will need rf devices, while the infrared offers you a maximum distance of 12m inline of sight.
about noise you better use fsk fm modules and use an a good prtocol to link your modules.
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