SDH Access
N*2M SDH business access is suitable for customers who require "low bandwidth, high quality, and high reliability."
N*2M digital circuits make full use of the reliable, simple, efficient, and low-latency features of the basic telecommunications operators' SDH transmission network. This access method is ideal for dedicated line internet access customers who demand "low bandwidth, high quality, and high reliability." The construction is easy with flexible and convenient arrangements. Customers can flexibly choose between different bandwidths, such as 2M, 4M, 6M, 8M, 10M, etc.
Concept of SDH
SDH (Synchronous Digital Hierarchy) optical terminals have a large capacity, typically ranging from 16E1 to 4032E1. SDH is an integrated information transport network combining multiplexing, line transmission, and switching functions, all operated by a unified network management system. It was initially proposed as the Synchronous Optical Network (SONET) by Bell Communications Research in the United States. In 1988, the International Telegraph and Telephone Consultative Committee (CCITT) (now ITU-T) adopted the SONET concept and renamed it SDH, making it a universal technology framework suitable for not only optical fiber but also microwave and satellite transmissions. It offers various features, such as effective network management, real-time service monitoring, dynamic network maintenance, and interoperability between different manufacturers' equipment. These capabilities significantly improve network resource utilization, reduce management and maintenance costs, and enable flexible, reliable, and efficient network operation and maintenance. Hence, SDH has become a hot topic within the field of information technology in terms of transmission technology development and application.