Standards library
Practical summaries of the international standards that govern fiber optics — with links to the official sources. Standards texts are copyrighted by their publishers; always obtain the official document.
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ITU-T
G.9807.1
10-Gigabit-capable symmetric PON (XGS-PON)
Symmetric ~10 Gbps PON at 1577/1270 nm, designed to coexist with GPON on the same ODN — today's mainstream FTTH upgrade path.
ITU-T
G.984 series
Gigabit-capable passive optical networks (GPON)
Defines GPON: 2.488 Gbps downstream / 1.244 Gbps upstream, 1490/1310 nm wavelengths, ODN classes (e.g., B+ 28 dB), TDMA upstream and management (OMCI).