The answer is actually no—fiber optic equipment differs significantly from cable setups. Unlike DSL or cable, which transmit data using electrical signals over copper wires, fiber optics utilize thin strands of glass or plastic to carry data in the form of light pulses. Most fiber ISPs. A fiber cable (drop) is run from a nearby terminal that could be either a pole or an underground box) to your home. A small box on the outside of your home called a NID is installed and the fiber is coiled in there and connected to a fiber that runs into the home. Compatible router: Verify that your router supports fiber optic input (look for an SFP or WAN port labeled. This device is essential for connecting your home to AT&T's high-speed fiber network and enabling Wi-Fi connectivity throughout your residence.