النتائج (
العربية) 1:
[نسخ]نسخ!
Disadvantages of the sdh One gain , one loss . the adove advantages of sdh are achieved at the cost of certain aspects ;• Since many overhead bytes are used for OAM functions , SDH has a lower dandwidth utilization ratio than PDH • Direct adding and dropping of a lower-rate signal is achieved using pointers . however , the pointer function increases the complexity and generates jitter in the system .• Software plays a large role in the system . as result SDH system is vulnerable to computer viruses.
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