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Digi Connect IT 4/Mini & Digi Connect IT 16/48 - RJ45 RS232 Serial Pinout Differences | Digi International
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StarTech.com 3ft [1m] DB9 to 3.5mm Serial Cable for Serial Device Configuration, RS232 DB9 Male to 3.5mm for Calibrating via Audio Jack (9m351m-rs232-cable) - Walmart.com
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