Total time from order to installation: This can range from a few days to 2-4 weeks, depending heavily on the ISP's current workload and your ability to schedule an appointment. In high-demand periods or areas, it might stretch to 4-6 weeks. Small installations may take a few days, while larger projects can extend over several weeks. 2: What is the difference between single-mode and multi-mode fiber? A: Single-mode. How long does the setup take? Most residential jobs finish within a few hours. We want to clear up the confusion around these schedules. Every building has unique needs. This is because the fibre cable needs to be laid over a longer distance, which can be. As a general rule, fiber construction takes 6 to 10 months for a network to become operational, after the beginning of a build-out. However, the construction timeline for a new fiber optic network varies depending upon the number of route miles to be constructed, the number of homes or premises. This involves planning, obtaining permits, trenching or laying new cables along streets and potentially across private property, and connecting to the wider network. Distance to Network Node: Even with. Railway corridors offer a convenient pathway for laying fiber optic cables underground.