المرة ديه أنا جايبلكم 3 كورسات من شركة هواوى عن الـ SDH Transmission بتحتوى على :
SDH Fundamentals
SDH Networking
OptiX Hardware
وكمان شرح فيديو للـ SDH Basics
SDH (Synchronous Digital Hierarchy) is a standard technology for synchronous data transmission on optical media. It is the international equivalent of Synchronous Optical Network. Both technologies provide faster and less expensive network interconnection than traditional PDH (Plesiochronous Digital Hierarchy) equipment.
الرابط لتحميل
http://www.tkne.net/vb/t55898.html
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