PON Optical Distribution Network (ODN) Classes
The measurements' standard PASS/FAIL criteria are based on the optical level thresholds that depend on the location (site) in which the measurements were taken, the type of PON network and the expected ODN Class.
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PON Test Profile
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1G Only
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1G+10G or 10G Only
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Network Type
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A/B/E/G-PON
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G-PON
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XGS-PON
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Downstream Wavelength
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1490 nm
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1490 nm
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1577 nm
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Downstream Passband
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1480 nm to 1500 nm
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1480 nm to 1500 nm
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1575 nm to 1580 nm
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PON Class
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A
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B
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B+
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C
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Ext C+
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Ext D
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B+
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C+
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10G-N1
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10G-N2
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E1
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E2
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OLT Site Thresholds (dBm)
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0 to +4
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+5 to +9
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+1.5 to +5
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+3 to +7
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+3 to +7
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+6 to +10
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+2 to +5
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+6 to +9
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+2 to +5
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+4 to +7
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+6 to +9
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+8 to +11
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ONT Site Thresholds (dBm)
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-21 to -1
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-21 to -1
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-27 to -8
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-28 to -8
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-30 to -8
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-30 to -8
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-27 to -8
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-27 to -8
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-28 to -9
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-28 to -9
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-28 to -9
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-28 to -9
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ITU-T Standards
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G.984.2 2019/08
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G.9807.1 2020/10 Amd2
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For latest revisions of GPON standards, please visit https://www.itu.int/rec/T-REC-G.984.2-201908-I and for XGS-PON standards, please visit https://www.itu.int/rec/T-REC-G.9807.1/en.