https://dcscom.net/data-communications-en/media-converters-en/copper-to-fiber-media-converters-en/standalone-unmanaged-en/fast-ethernet-en/media-converter-s-100-s2st80-en/
S-100-S2ST80 - Fast Ethernet Stand-Alone Media Converter
Perle stand-alone Fast Ethernet Media Converters extend 100Base-TX equipment over 100Base-FX fiber optic cable.
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https://www.perle.com/products/10-100-converters.shtml
10-100 Converter | Stand-alone Media Converter 10-100 | Perle
Stand-alone 10/00 to fiber Media Converters from Perle provide 10 Mbps and 100 Mbps Ethernet UTP connections to remote equipment over fiber optic cable.
stand alone mediaconverterperle