one of a group of cells that develop in the walls of the seminiferous tubules. Spermatogenic cells include spermatogonia, spermatocytes, and spermatidsâall of which are transitional forms between primary sexual cells and spermatozoa.
long-haul optics. Long-haul optics refers to the transmission of visible light signals over optical fiber cable for great distances, especially without or with minimal use of repeaters. Normally, repeaters are necessary at intervals in a length of fiber optic cable to keep the signal quality from deteriorating to the point of non-usability. In long-haul optical systems, the goal is to minimize the number of repeaters per unit distance, and ideally, to render repeaters unnecessary.
10GBASE-SR/SW. 10GBASE-SR/SW is a port type for multimode fiber and uses 850nm lasers. The letter âSâ stands for short reach, thus the standard is designed to be deployed in a short distance up to 300 m. In addition, both SR and SW fall under the S category of 10GBASE-S standard. They are basically the same thing.