Shahed Israr

Shahed Israr is a Network Engineer specializing in GPON, FTTH, and telecom access network technologies. With hands-on experience in Huawei OLT and ONT configuration, U2000 NMS deployment, iMaster NCE-FAN Lite management systems, firmware upgrades, and advanced network troubleshooting, he helps Internet Service Providers (ISPs) and network professionals deploy, manage, and optimize fiber optic networks efficiently. Through GPON Solution, he shares practical technical guides, real-world solutions, and professional knowledge to support engineers working in modern GPON infrastructure.

Optical module fault Alarm Huawei OLT

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Optical module fault Alarm Huawei OLT:

Today I will discuss Last down cause: Optical module fault alarm. When you connect a non brand SFP or SFP not match with your OLT version then OLT display Optical module fault Alarm. I face a problem, when i connect a new SFP in H805GPFD board then 0-7 port SFP is working but 8-15 port was not working. When we connect NeoPhotonics Class B+ SFP then it work fine. bellow are the both status.

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Unsupported SFP Status:

NMC_Huawei_OLT02(config-if-gpon-0/0)#display port state 8
—————————————————————————-
F/S/P                        0/0/8
Optical Module status        Online
Port state                   Offline
xPON MAC chipset state       Normal
Last down cause              Optical module fault
Last up time                 09/12/2015 15:31:57+06:00
Last down time               09/12/2015 15:40:47+06:00
Laser state                  Failed
Available bandwidth(Kbps)    1239040
Temperature(C)               –
TX Bias current(mA)          –
Supply Voltage(V)            –
TX power(dBm)                –
Illegal rogue ONT            –
Max rate(Kbps)               2500000
Max Distance(Km)             20
Wave length(nm)              1490
Fiber type                   Single Mode
  Signal detect                Failed
TX fault                     Normal
Identifier                   SFP
Ext.Identifier               GBIC/SFP function is defined by serial ID only
Connector                    SC
Encoding                     NRZ
Length(9¦Ìm)(km)             20.0
Length(50¦Ìm)(m)             –

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Basic Layout of Huawei OLT

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Basic Layout of Huawei OLT Today i will discuss about Basic Layout of Huawei OLT. Bellow are the details…. [boxads] Basic Layout: Chassis: bundled sales, not sold separately. MPU: generally double master, one for main and one for standby, SCUN, MCUD (MA5608T) are common used. Power Plate: generally dual power, one for main and one … Read more

Dying gasp Alarm GPON Huawei ONTi (DGi)

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Dying gasp Alarm GPON ONTi (DGi)

When ONT goes offline then Huawei OLT receives a message from ONT then system generates dying gasp alarm. If power cord remove from ONT without power off ONT device or Load shedding causes electricity power go away then system generates dying gasp alarm.

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Attribute:

Alarm ID Alarm Severity Alarm Type
0x2e11a00b Minor Fault
Dying gasp Alarm GPON Huawei ONTi (DGi)
Dying gasp Alarm GPON Huawei ONTi (DGi)

Parameters:

Name Meaning
FrameID The ID of the shelf where the alarm is generated.
SlotID The ID of the slot where the alarm is generated.
PortID The ID of the port where the alarm is generated.
ONT ID The ID of the ONT where the alarm is generated.
Equipment ID The ID of the equipment where the alarm is generated.
Description of the ONT(Only for NMS) The description of the ONT (only available on the NMS), which can be used to distinguish different ONTs.

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Key Differences Between GPON SFP Class B+ and C+

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Key Differences Between GPON SFP Class B+ and C+ [boxads] The Key Differences Between GPON SFP Class B+ and C+ are their TX power and RX Sensitive. Class B+ OLT transceiver: TX power 1.5~5db, RX sensitive -28db. Class B+ ONU transceiver: : TX power 0.5~5db, RX sensitive -27db. Class C+ OLT transceiver: TX power 3~7db, … Read more

System encoding Huawei OLT

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System encoding Huawei OLT System encoding command is used to configure the encoding mode of the system. When you need to change the encoding mode of the system, run this command. [boxads] The undo system encoding command is used to restore the default encoding mode of the system. When you need to restore the default … Read more