Specifications
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ANSI T1.105, Telecommunications - Digital Hierarchy - Optical Interface 
Rates and Formats Specifications (SONET)  
ANSI T1.105, Synchronous Optical Network (SONET) Basic Description 
Including Multiplex Structures, Rates, and Formats  
ANSI T1.105.02, Synchronous Optical Network (SONET) Payload 
Mappings  
ANSI T1.105.06, SONET: Physical Layer Specifications  
ITU-T Recommendation G.707 (1996), Network node interface for the 
synchronous digital hierarchy (SDH)  
ITU-T Recommendation G.783 (1994), Characteristics of Synchronous 
Digital Hierarchy (SDH) equipment functional blocks  
ITU-T Recommendation G.813 (1996), Timing characteristics of SDH 
equipment slave clocks (SEC)  
ITU-T Recommendation G.825 (1993), The control of jitter and wander 
within digital networks which are based on the Synchronous Digital 
Hierarchy (SDH)  
ITU-T Recommendation G.831 (1993), Management capabilities of 
transport networks based on Synchronous Digital Hierarchy (SDH)  
ITU-T Recommendation G.957 (1995), Optical interfaces for equipments 
and systems relating to the synchronous digital hierarchy  
ITU-T Recommendation G.958 (1994), Digital line systems based on the 
Synchronous Digital Hierarchy for use on optical fibre cables  
ITU-T Recommendation I.432 (1993), B-ISDN User-Network Interface 
Physical layer specification  










