中广协会电视文艺工作委员会 The fourth era of fiber-optic communication systems utilised optical amplification to reduce the have to have for repeaters and wavelength-division multiplexing (WDM) to extend details potential. The introduction of WDM was the beginning of optical networking, as WDM grew to become the technological know-how of option for fiber-optic bandwidth https://bodyguard93704.dbblog.net/7071659/services-an-overview