This article will explore the three core stages: fiber optic cable selection and installation, usage and maintenance, and aging assessment and replacement, offering practical strategies for extending cable lifespan, reducing failure rates, and improving network operation. This article will explore the three core stages: fiber optic cable selection and installation, usage and maintenance, and aging assessment and replacement, offering practical strategies for extending cable lifespan, reducing failure rates, and improving network operation. Fiber optic network design refers to the specialized processes leading to a successful installation and operation of a fiber optic network. It includes first determining the type of communication system (s) which will be carried over the network, the geographic layout (premises, campus, outside. Thus, understanding the full lifecycle of fiber optic cables is essential not only for technical success but also for maximizing ROI and minimizing future upgrade costs. This guide walks you through a professional, future-ready lifecycle strategy, structured around the key stages: planning. Planning and design is a process that includes many decisions, involving first defining the communication protocols to be used on the network and defining geographical layout. It also involves selecting transmission equipment. Routine inspections are essential for identifying early signs of wear or damage. Tools like Optical Time Domain Reflectometers (OTDRs) can detect faults such as micro-bends, breaks, or splice losses with pinpoint accuracy (10).