Title :
Synchronous digital transmission systems based on CCITT SDH standard
Author :
Kasai, Hiroyuki ; Murase, Takehiro ; Ueda, Hiromi
Author_Institution :
NTT Corp., Tokyo, Japan
Abstract :
The synchronous digital hierarchy (SDH) transmission systems developed by NTT are discussed. The advantages of SDH are detailed, stressing its simplified network structure and enhanced operations, administration, and maintenance functions. The layered architecture of the SDH systems is described. NTT´s SDH fiber-optic transmission systems and digital radio transmission systems are presented.<>
Keywords :
digital communication systems; optical links; radio equipment; radio links; standards; telecommunication network management; CCITT SDH standard; NTT; administration; digital radio transmission systems; fiber-optic transmission systems; layered architecture; maintenance functions; network structure; operations; synchronous digital hierarchy; Containers; Costs; Digital communication; ISDN; Jitter; Optical fibers; Pulse modulation; Synchronous digital hierarchy; Telegraphy; Virtual colonoscopy;
Journal_Title :
Communications Magazine, IEEE
