Transmission Systems
SDH (Synchronous Data Hierarchies) A high-speed international transmission system which capable of carrying digital signals at different capacities. SDH uses fiber optic links to take advantage of the high bandwidth and reliability of the fiber optic environment.
SDH SPEEDS;
STM1- 155Mbps
STM4- 622Mbps
STM16-2.4Gbps
STM64-10Gbps
PDH (Plesiochronous digital hierarchy) is a system for transporting data over telecommunication networks in large dimensions. This synchronous system is specifically designed to provide a simple and flexible network infrastructure. This system has changed significantly in terms of performance and cost in telecommunications networks based on optical fibers.
Some of the most enjoyable advantages of using SDH are;
1- Optical interfaces
2- Strong orientation capacity
3- In world standard format
4- Flexible synchronous structure
5- Reduced network density due to cross compatibility
SDH-PDH PRODUCTS;
Huawei OSN 3500
The OptiX OSN 3500 can be use in packet mode (MPLS / MPLS-TP based) or TDM mode. data service and conventional SDH service can be handled in the most appropriate way.The OptiX OSN 3500 delivers voice and data services on the same platform with high efficiency.

Orion SDH
-Supports 63 pieces 1
-Supports RS232 serial interface
- Supports remote (remote) access
- Synchronization with timing on STM-1,4 line
- Synchronization with timing from any E1 interface
- External timing source option
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