04-07-2012, 04:54 PM
Standards and Applications of SDH
SDH presentation.ppt (Size: 188.5 KB / Downloads: 36)
Why SONET/SDH
SONET/SDH’s goal
simplify interconnection between network operators
expand the compatibility
Imperfection of PDH
Three different regional digital hierarchies
Rate & Format conversion induces extra high cost to customers
Demanding broadband services
To the high speed signals, the processing time for performing
conversion between PDH region is not long enough
SONET/SDH benefits
Reduce costs
simplified standard interfaces
eliminate vendor proprietary interfaces
Integrated network elements
enhanced operations capabilities
Survivability
grants upgradability (modularity)
No bandwidth bottlenecks