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Huawei / SFP optical transceivers

Huawei 10G SFP+ 40km Equipment information & support

The Huawei 10G SFP+ 1550nm 40km (10GBASE-ER) is an enterprise-grade long-reach optical transceiver engineered for high-attenuation 10Gbps Ethernet links up to 40km over single-mode fiber with duplex LC connectors.

Equipment information

Brand
Huawei
Equipment model
Huawei 10G SFP+ 40km
Equipment type
SFP optical transceivers
Controller / software version
Confirm against the installed equipment
View full product specifications
Huawei 10G SFP+ 40km Official Product View 3

Information below comes from the current product catalogue. Confirm the controller, software version and configuration of the installed equipment separately.

Physical Form Factor
SFP+ (10GBASE-ER)
Data Rate
10.3125 Gbps
Central Wavelength
1550 nm
Maximum Distance
40 km
Fiber Type
Single-Mode Fiber (SMF) (SMF)
Optical Connector
Duplex LC (red pull ring)

Alarms & troubleshooting

RX_LOS (Loss of Optical Receive Signal)
Port LINK/ACT LED is OFF; system ALM LED is solid RED
Fiber break on the span, remote transmitter disabled, heavily contaminated LC end-faces, or link attenuation exceeding sensitivity threshold (<-15.8 dBm).
1. Run 'display transceiver interface' to check current optical Rx power. 2. Measure incoming optical power with an optical power meter to confirm remote TX is active. 3. Clean local and ODF LC connector end-faces using an optical fiber cleaner. 4. Perform OTDR test on the 40km span to locate fiber breaks and splice accordingly. 5. If incoming power is normal (-1 to -14 dBm) but alarm persists, replace the SFP+ module.
BIAS_HIGH_ALARM (Laser Bias Current High Alarm)
Port LINK/ACT LED is solid AMBER; system ALM LED blinks AMBER slowly
Physical degradation of the 1550nm EML transmitter, internal laser driver failure, or prolonged exposure to high operating temperatures causing bias drift.
1. Run 'display transceiver verbose' to inspect current Bias Current and high alarm threshold. 2. Verify device ambient air temperature and fan tray health to mitigate thermal stress. 3. Check optical Rx power at the remote end to detect optical degradation. 4. If bias current continuously exceeds threshold (>80-100 mA), the laser is end-of-life; schedule a maintenance window to replace the SFP+ 40km transceiver.
TEMP_HIGH_ALARM (Transceiver High Temperature Alarm)
Port LINK/ACT LED blinks AMBER; system ALM LED is solid AMBER
Elevated ambient datacenter temperature, clogged chassis air dust filters, fan tray failure, or thermal dissipation bottlenecks caused by high-density adjacent 40km optics exceeding DDM limit (>75°C).
1. Execute 'display transceiver verbose' to verify real-time DDM temperature reading. 2. Run 'display environment' to evaluate chassis thermal profile and fan PWM speeds. 3. Clean or replace air filters and clear obstructions along the chassis air exhaust. 4. Verify datacenter precision cooling operation and cold/hot aisle airflow containment. 5. Interleave long-reach 40km transceivers across panel slots to eliminate localized thermal hotspots.
RX_PWR_LOW (Optical Receive Power Below Threshold)
Port LINK/ACT LED is solid AMBER; port alarm reported to NMS
Excessive fiber bending (macro/micro-bend loss) across the 40km span, dirty or degraded patch panel adapters, or high splice insertion loss bringing Rx power near receiver threshold (-14 to -15.8 dBm).
1. Run 'display transceiver interface [port] verbose' to check Rx Power and Low Alarm Threshold. 2. Inspect patch cords inside cabinets, maintain bend radius >30mm, and eliminate tight cable ties. 3. Clean optical connector end-faces and the SFP+ optical bore using specialized fiber video probes and cleaners. 4. Run OTDR trace along the 40km link to locate high-loss events; re-splice events with loss >0.1 dB. 5. If line attenuation is within design spec, swap transceivers to confirm whether internal APD/PIN receiver degraded.
LINK_FLAPPING_CRC (Port Link Flapping & High CRC Error Rate)
Port LINK/ACT LED toggles rapidly between GREEN and OFF; continuous syslog flap generation
Optical signal power hovering around receiver sensitivity threshold, excessive chromatic dispersion on the 40km link, oxidized SFP+ edge connector pins, or clock and data recovery (CDR) lock loss at 10.3125 Gbps.
1. Run 'display interface [port]' to monitor real-time increment of CRC errors and Input Errors. 2. Check 'display logbuffer' to evaluate port Up/Down flapping intervals and frequency. 3. Reseat the SFP+ transceiver, inspect edge connector pins for oxidation or physical damage, clean with isopropyl alcohol. 4. Verify chromatic dispersion across 40km span is within module tolerance (~800 ps/nm); insert optical attenuators or DCF if needed. 5. Enable 'port link-flap protection' to stabilize switching topology; replace the module if errors follow the transceiver during cross-testing.

Access Complete Maintenance & Full Alarm Troubleshooting Manual

This page lists high-frequency critical alarm codes commonly encountered in field maintenance. Comprehensive manufacturer troubleshooting matrices, board-level repair guides, detailed electrical schematics, and firmware commissioning manuals are delivered alongside equipment upon formal project procurement, accompanied by dedicated FAE technical support.

Contact Account Manager for Full Manual

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