Market Applications of MSTP Optical Transmission Equipment
The MSTP optical transmission equipment transmission system has a unified frame structure, digital transmission standard rates, and standard optical interfaces internationally, enabling interconnection of network management systems. It therefore offers excellent horizontal compatibility, is fully compatible with existing PDH, and accommodates various new service signals, forming a globally unified digital transmission standard and improving network reliability.
The code streams at different levels in the MSTP optical transmission equipment access system are arranged in a highly regular pattern within the payload area of the frame structure, and the payload is synchronized with the network. MSTP optical transmission equipment uses software to directly drop and insert low-speed tributary signals from high-speed signals in a single step, achieving one-step multiplexing. This overcomes the PDH plesiochronous multiplexing process of demultiplexing all high-speed signals stage by stage and then regenerating and remultiplexing them. By greatly simplifying the DXC and reducing back-to-back interface multiplexing equipment, it improves the transparency of service transmission in the network.
Raytrans MSTP optical transmission equipment adopts advanced Add-Drop Multiplexers (ADM) and Digital Cross-Connects (DXC), making the network's self-healing and reconfiguration capabilities exceptionally powerful, with high survivability. Since the SDH frame structure allocates 5% overhead bits for signals, its network management functionality is particularly robust and can be unified into a network management system. MSTP optical transmission equipment plays a positive role in network automation, intelligence, channel utilization, and reducing network maintenance costs while improving survivability.
Due to the multiple network topologies of SDH, the networks it forms are highly flexible. It enhances network monitoring, operation management, and automatic configuration functions, optimizing network performance while also making network operation flexible, secure, and reliable, with comprehensive and diverse network functions.
SDH possesses both transmission and switching capabilities. Its series of equipment can be freely combined through functional blocks to implement networks at different levels and with various topologies, offering great flexibility.
SDH is not exclusive to any particular transmission medium; it can be used over twisted pair and coaxial cable, but SDH requires optical fiber for high data rate transmission. This characteristic indicates that SDH is suitable for both trunk lines and branch lines. For example, China's national and provincial cable television trunk networks adopt SDH, and it is also easily compatible with Hybrid Fiber-Coax (HFC) networks. From the perspective of the OSI model, SDH belongs to the lowest physical layer, with no strict restrictions on its upper layers, making it convenient to adopt various network technologies over SDH, supporting ATM or IP transmission.
SDH is strictly synchronous, ensuring stable and reliable network operation, low bit errors, and ease of multiplexing and adjustment. Standard open optical interfaces enable horizontal compatibility over basic optical cable sections, reducing networking costs.