Editing Synchronous optical networking (section)

==SONET/SDH and relationship to 10 Gigabit Ethernet==
Another type of high-speed data networking circuit is [[10 Gigabit Ethernet]] (10GbE). The Gigabit [[Ethernet Alliance]] created two 10 Gigabit Ethernet variants: a local area variant ('''LAN PHY''') with a line rate of 10.3125&nbsp;Gbit/s, and a wide area variant ('''WAN PHY''') with the same line rate as OC-192/STM-64 (9,953,280&nbsp;kbit/s).<ref>IEEE Std 802.3bv-2017</ref> 

The WAN PHY variant encapsulates Ethernet data using a lightweight SDH/SONET frame, so as to be compatible at a low level with equipment designed to carry SDH/SONET signals, whereas the LAN PHY variant encapsulates Ethernet data using [[64b/66b encoding|64B/66B]] line coding.

However, 10 Gigabit Ethernet does not explicitly provide any interoperability at the bitstream level with other SDH/SONET systems. This differs from WDM system transponders, including both coarse and dense wavelength-division multiplexing systems (CWDM and DWDM) that currently support OC-192 SONET signals, which can normally support thin-SONET–framed 10 Gigabit Ethernet.