ATIS - Alliance for Telecommunications Industry Solutions
Scope
This report covers the comparison of transport rates; multiplexing structure; payload mappings; Operations@ Administration@ Management and Provisioning (OAMP); and interworking issues. Purpose SONET and SDH are compatible@ but not identical@ digital hierarchies. Both define similar sets of overheads and functions@ however@ there are differences in the usage of the two overhead structures. The purpose of this technical report is to identify the areas where SONET and SDH differ - in overhead/format definition - in usage/interpretation of overheads Once the differences have been clearly identified@ it will be possible to assess the appropriate actions to be taken to insure smooth interworking between networks based on the two hierarchies. The Table 8 of this document is divided into two parts 8a and 8b. The first part@ 8a@ contains the detailed descriptions/definitions of the bytes as found in the standards documents as well as differences between SONET and SDH. The second part@ 8b@ documents the performance information as found in standards documents and highlights differences between SONET/SDH. In addition@ the interworking information is grouped by SONET/SDH layers: Section@ Line@ and Path.