According to the ITU-T G.984.X series standards, the downstream transmission wavelength of the GPON network is ( ) nm.
GPON Wavelengths :
GPON networks use specific wavelengths for upstream and downstream transmission:
Downstream (OLT to ONU) : 1490 nm.
Upstream (ONU to OLT) : 1310 nm.
Optional CATV overlay : 1550 nm (used for video services).
Why 1490 nm?
The ITU-T G.984.x standards specify 1490 nm as the wavelength for downstream data transmission in GPON networks. This wavelength is chosen for optimal performance in fiber-optic communication.
Other Options :
850 nm : Used in multimode fiber for short-distance communication, not in GPON.
1310 nm : Used for upstream transmission in GPON.
1550 nm : Optional wavelength for CATV overlay, not for standard downstream data.
Thus, the correct answer is A .
HCIA Huawei ACCESS Official Documentation , Chapter: GPON Wavelengths.
ITU-T G.984.x Standards for GPON .
Generally, you are advised to configure NMS VLANs as follows:
vlan 350 smart
vlan desc 350 description "Manage"
port vlan 350 0/8 0
The ONU connected to the GPON port can go online normally. However, when you run thedisplay ont infocommand on the OLT to query the ONU information, "Match state" is displayed as mismatch. The possible causes are:
Which of the following statements about MIB is incorrect?
OIDs (Object Identifiers)are numeric (e.g., 1.3.6.1.2.1.1.5), not letters. The statement inCis incorrect.
Which of the following protocols are included in Point-to-Point Protocol (PPP)? (Select All that Apply)
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