Difference between conventional WDM equipment and OTN equipment

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Both of them use the DWDM technology. The difference between them lies in that OTN equipment can achieve electrical cross-connection scheduling for various types of services.

Other related questions:
Interconnection and differences between FEC and AFEC on WDM equipment
AFEC is an enhanced forward error correction function, but FEC is a standard error correction function. The frame structures of the two functions are different and therefore cannot be interconnected.

Method to query the wavelength information of a line board on WDM/OTN equipment
In the NE Explorer, select the target board and choose Configuration > WDM Interface from the navigation tree. On the Advanced Attribute tab, wavelength information is displayed.

Products included in OTN equipment
Currently, Huawei OTN devices include OSN 1800, OSN 3800, OSN 6800, OSN 8800, and OSN 9800.

Major difference between 10GE LAN services and 10GE WAN services in OTN equipment
Their bottom-layer encapsulation structures are different. A 10GE WAN signal contains an SDH/SONET encapsulation header but a 10GE LAN signal does not. 10GE LAN service: Ethernet MAC frames are processed based on 66B/64B line coding and then are directly transmitted over an optical fiber at a rate of 10.31 Gbit/s. 10GE WAN services: Ethernet MAC frames are processed based on 66B/64B line coding, encapsulated into standard SDH/SONET frames, and then directly transmitted over an optical fiber at a rate of 9.95 Gbit/s.

Dustproof requirements for WDM equipment
The operating environment requirements of WDM equipment must comply with IEC 60529 (Degrees of protection provided by enclosures).

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