The International Telecommunication Union (ITU) has been continuously improving industry standards for OS2 fiber, which range from G.652 fiber to G.657 fiber. These standards, such as G.659.A1/A2/B2/B3, are designed to optimize the insensitivity of single-mode patch cable for the complex connectivity requirements of 5G and other demanding situations. Single-mode fiber is widely used in the construction of 5G networks and in fiber-to-the-home (fth) solutions. It provides high bandwidth and long-haul capability, making it suitable for high-capacity and high-speed data transmission requirements. In 5G networks, OS2 fiber is prioritized for core networks and long-distance connectivity, with 25GSFP28 patchal modules, which transmit patchal power of -7~+3dbm, and transmission distances of up to 10km. While in the deployment of fiber patch transmission systems, single mode patch cables ensure reliable signal quality over long distances, connecting the user's home or office to the fiber patch network infrastructure. The next trends in single-mode fiber are performance improvements, integration with emerging technologies, and cost parity with multimode fiber. These trends will shape the future of single-mode patch cable, ensuring it becomes the solution of choice for data centers and enterprise networks. The innovation and promise of single-mode fiber technology shows that it has great potential for communications.VANDESAIL - Accelerating the world with technology.