Indoor optical cables are constructed by placing colored optical fiber cores within loose tubes, followed by the uniform release of multiple strands of aramid fibers for reinforcement, and finally extruding a flame-retardant outer sheath to effectively protect the optical fibers from external forces. By selecting high-quality optical fibers, utilizing specialized equipment, and employing reasonable process design, the product's performance exceeds the requirements of international standards such as ISO/IEC 11801. The product features high-quality performance, with performance metrics exceeding the requirements of standards such as ANSI/TIA-568.3-D, IEC 60794, and YD/T 1258.4; the optical fiber characteristics meet and exceed the requirements of standards such as ITU-T G.561, ITU-T G.652.D, and IEC 60793.