Broadband refers to high capacity high speed（typically greater than 256 kbit/s in both direction）

Internet or network connections carried on coaxial or fiber optics cables with wider bandwidth than conventional copper telephone lines.Broadband channel can carry voice

video and data simultaneously.Broadband is available in number of different technologies.E.g. Copper using DSL technology

optical fiber technology using FTTH

cable TV network and wireless technology using WiFI and Wi-Max.The optical fiber technology for providing broadband services using FTTH networks i.e fiber to the last mile.Properties of ideal fiber used in metro and access networks to provide broadband services

and low water peak ITU T G.652D

due to its low attenuation at 1383±3 nm and low polarization mode dispersion（PMD）

meets and exceeds the requirement of ideal fiber in broadband network.