H35-210_V2.5 · Question #393
Which of the following is the downstream wavelength of XGS-PON?
The correct answer is C. 1577 nm. XGS-PON Wavelengths: XGS-PON (10-Gigabit Symmetric Passive Optical Network) uses specific wavelengths for upstream and downstream transmission: Downstream (OLT to ONU): 1577 nm. Upstream (ONU to OLT): 1270 nm. The ITU-T G.9807.1 standard specifies 1577 nm as the downstream…
Question
Which of the following is the downstream wavelength of XGS-PON?
Options
- A1490 nm
- B1310 nm
- C1577 nm
- D1290 nm
How the community answered
(39 responses)- A8% (3)
- B3% (1)
- C77% (30)
- D13% (5)
Explanation
XGS-PON Wavelengths: XGS-PON (10-Gigabit Symmetric Passive Optical Network) uses specific wavelengths for upstream and downstream transmission: Downstream (OLT to ONU): 1577 nm. Upstream (ONU to OLT): 1270 nm. The ITU-T G.9807.1 standard specifies 1577 nm as the downstream wavelength for XGS-PON. This wavelength is chosen to avoid interference with GPON, which uses 1490 nm for downstream
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