Patchcord single-mode measuring 30 meters in length, with a cable diameter of approximately 3mm, terminated with SC/APC-SC/APC connectors, is utilized for connecting network optical equipment such as switches and converters. They are widely used in FTTH networks to connect devices like OLT and ONU/ONT. Additionally, these cables are classified as LSZH, meaning that their outer sheath is made from thermoplastic or thermoset compounds that emit limited smoke and do not release halogens under high heat sources.