This paper focuses on the system architecture of OptiX OSN products. Utilizing multiple types of single boards, OptiX OSN products form a system framework centered on SDH cross pitch and packet switching units. This framework contains the individual units.

Framework units supported by OptiX OSN1500

Unit		Description
Network Side Service Interface Unit	TDM mode	SDH Interface Unit WDM Unit Optical power amplifier unit
	Packet mode	Ethernet Interface Unit CES Interface Unit
Core Unit	TDM Mode	SDH Cross Matrix Unit
	Packet Mode	Packet switching unit
Subscriber-side service interface unit	TDM mode	SDH interface unit PDH Interface Unit Ethernet interface unit DDN interface unit ATM/IMA interface unit RPR Interface Unit SAN/Video interface unit
	Packet Mode	Ethernet Interface Unit CES Interface Unit
Common Unit		Overhead Handling Unit Synchronization Timing Unit Power Supply Access Unit Auxiliary Interface Unit System control and communication unit

The related technical information in this chapter and the troubleshooting process of SDH equipment are provided by Shenzhen Optical Transmission Network Technology Company Limited ( www.opticaltrans.com), please retain the reproduction! Huawei SDH Optical Transmission Equipment,SDH Transmission Equipment Sales