The LINK-PP LS-BL55311G-40I 1G BiDi transceiver delivers stable 1.25 Gbps connectivity over single-mode fiber, supporting transmission distances of up to 40 km. It operates using a wavelength pair of 1550nm (TX) and 1310nm (RX), enabling efficient bidirectional communication over a single fiber strand.
LINK-PP Part Number
LS-BL55311G-40I
Vendor Name
LINK-PP
Form Factor
SFP
Max Data Rate
1.25Gbps
Wavelength
1550nm-TX/1310nm-RX
Max Cable Distance
40km
Connector
Simplex LC
Media
SMF
Transmitter Type
DFB BiDi
Receiver Type
PIN
TX Power
-5 to 0dBm
RX Power
-23 to -1dBm
Receiver Sensitivity
<-24dBm
Receiver Overload
-1dBm
Operating Temperature Range
-40 to 85°C
Protocols
Fast Ethernet, Gigabit Fibre Channel, MSA Compliant
Key Features of LINK-PP LS-BL55311G-40I 1G BiDi SFP
Experience stable, long-distance connectivity with the LINK-PP LS-BL55311G-40I 1G BiDi optical module. This industrial-grade transceiver offers 1.25 Gbps data transfer over 40km and supports full-duplex transmission over a single fiber using BiDi technology, ensuring consistent, rugged performance even in tough environments.
This LINK-PP LS-BL55311G-40I optical module is equipped with a DFB laser and a PIN/TIA receiver with matched transmit and receive wavelengths. It enables efficient single-fiber bidirectional communication.
LS-BL55311G-40I: Reliable 1.25 Gbps Connectivity for Efficient Gigabit Connectivity
The LINK-PP LS-BL55311G-40I BiDi SFP module offers reliable connectivity, low latency, and stable data transmission at 1.25 Gbps for Gigabit Ethernet and Fiber Channel applications.
LS-BL55311G-40I Module with 1550nm-TX/1310nm-RX Wavelength
The LS-BL55311G-40I BiDi SFP module is designed with 1550nm transmission and 1310nm reception wavelengths, ensuring long-distance single-fiber bidirectional data transfer with lower cabling costs and faster fiber infrastructure deployment.
This LINK-PP LS-BL55311G-40I 1G BiDi SFP module supports transmission distances of up to 40 km over single-mode fiber, delivering steady signal performance with low attenuation over long-haul networks.
LS-BL55311G-40I Module with Simplex LC Interface
The simplex LC interface combines transmit and receive functions into a single connection point, thereby decreasing fiber usage, simplifying cable routing, and increasing cost efficiency.
LS-BL55311G-40I Module with DOM for Real-Time Monitoring
The LINK-PP LS-BL55311G-40I BiDi module includes a helpful Digital Optical Monitoring (DOM) function that allows for real-time tracking of critical parameters like temperature, voltage, transmit power, and receive power. This improves network visibility, simplifies maintenance, and enables faster fault diagnosis.
LINK-PP LS-BL55311G-40I 1G BiDi SFP Certification
Every LINK-PP module is crafted to meet ISO 9001 standards and is validated by CE, RoHS, and FCC certifications, enabling superior quality, safety, and long-term operational excellence.
Each module is thoroughly tested to assure consistent performance and long-term reliability across various deployment scenarios.
LS-BL55311G-40I Quality Certifications
LINK-PP modules are designed to meet global certification standards, ensuring high stability, durability, and full compliance with industrial requirements.
This product is in conformity with ISO9001. This system is valid to a company engaging in development, production and supply service of fiber optical products. Please contact us to learn more.
ISO/IEC 27001 is an international standard for managing and processing information security. This standard is jointly developed by the International Organization for Standardization (ISO) and the International Electrotechnical Commission (IEC). It sets out requirements for establishing, implementing, maintaining, and continually improving an information security management system (ISMS). Ensuring the confidentiality, integrity, and availability of organizational information assets, obtaining an ISO 27001 certificate means that the enterprise has passed the audit conducted by a certification body, proving that its information security management system has met the requirements of the international standard. Please contact us to learn more.
This product is in conformity with ISO14001.It is intended for use by an organization seeking to manage its environmental responsibilities in a systematic manner that contributes to the environmental pillar of sustainability. Please contact us to learn more.
ISO 45001 is a global standard that sets out the requirements for an occupational health and safety management system (OH&SMS).
REACH is a European Union regulation concerning the Registration, Evaluation, Authorization and Restriction of Chemicals. It came into force on 1st June 2007 and replaced a number of European Directives and Regulations with a single system. The regulation aims to protect human health and environmental safety, maintain and improve the competitiveness of the EU chemical industry, and develop innovative capabilities for non-toxic and harmless compounds to prevent market fragmentation, increase the transparency of the use of chemicals, promote non-animal experiments, and pursue sustainable social development.Please contact us to learn more.
This product meets the applicable requirements of Directive (EU) 2015/863 of RoHS. It restricts the use of 10 hazardous materials in the manufacture of various types of electronic and electrical equipment: lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls, polybrominated diphenyl ethers, and four different phthalates. Please contact us to learn more.
This product fully accords with the FCC, which aims to manage the radio wave and magnetic fields more reasonably. Please contact us to learn more.
CB is an international system operated by IECEE. This product is based on IEC standards for testing the safety performance of electrical products. Please contact us to learn more.
This product fully accords with UKCA (UK Conformity Assessed) certificate, which signifies that it meets all relevant quality standards as well as health and safety requirements. Please contact us to learn more.
UL certification is a non-mandatory certification in the United States,mainly testing and certification of product safety performance.Its ultimate purpose is to obtain products with a fairly safe level for the market,and to contribute to ensuring human health and property safety.Please contact us to learn more.
LS-BL55311G-40I Certified for Reliable Host-Device Compatibility
Tested for smooth integration with LINK-PP-compatible devices, allowing for simple setup and stable operation.
Rigorous Testing Ensures Reliable SFP Performance
Rigorous testing procedures ensure signal consistency and long-term reliability. For more details, refer to the LINK-PP Test Support Center.
Optical Spectrum Test
Validates precise wavelength alignment for standards-compliant performance.
Eye Pattern Test
Checks waveform clarity to support stable signal transmission.
Bit Error Rate Test
Ensures low BER for reliable data integrity.
Temperature Test
Assesses performance consistency under changing thermal environments.
Product Shipping for LINK-PP LS-BL55311G-40I 1G BiDi SFP
LINK-PP carefully oversees every stage from packaging to delivery, ensuring each product arrives in optimal condition.
Anti-Static Protective Packaging
Static-controlled packaging protects against electrostatic damage.
Shock-Resistant Transport Protection
Rugged transport protection keeps products safe in transit.
Fast Order Processing and Dispatch
Efficient handling systems shorten processing and shipping times.
Global Logistics and International Delivery
Worldwide distribution channels ensure dependable shipping service.
This LINK-PP LS-BL55311G-40I 1G BiDi SFP module is perfect for long-distance fiber connections to remote network cabinets, industrial control systems, campus networks, and telecom base stations. It works especially well in situations when fiber availability is restricted, and cost efficiency is crucial.
LS-BL55311G-40I Technical Support
LINK-PP provides professional technical support, including pre-sales consultation, compatibility verification, and post-deployment troubleshooting to ensure smooth network operation.
Pre-Sales Technical Consultation
Professional technical guidance to help customers select the most suitable LS-BL55311G-40I modules based on network architecture and application requirements.
Compatibility Verification Support
Compatibility checks and validation to ensure seamless operation with Cisco switches and other supported networking platforms.
Deployment & Installation Assistance
Step-by-step support for installation, configuration, and initial deployment to ensure stable and correct operation.
Long-Term Technical Assurance
Ongoing technical support throughout the product lifecycle to ensure reliable performance in enterprise and carrier-grade networks.
A:
Yes, the LS-BL55311G-40I comes pre-coded for broad OEM and MSA compatibility, including Cisco, MikroTik, Ubiquiti, Netgear, and other standard networking gear. It supports hot-swappable auto-recognition without needing forced EEPROM CLI overrides. By
admin on
2026-06-23
A:
Since this transceiver transmits at 1550nm (TX) and receives at 1310nm (RX), the opposite end of the single-strand fiber link must use a complementary 1G BiDi SFP transceiver with 1310nm-TX and 1550nm-RX (such as the LINK-PP LS-BL31551G-40I) to establish bidirectional communication. By
admin on
2025-09-28
A:
Yes, the LS-BL55311G-40I is an industrial-grade transceiver built for extreme environmental conditions. Integrated DDM/DOM (Digital Diagnostics Monitoring) allows network administrators to monitor real-time operating temperature, TX/RX optical power, supply voltage, and laser bias current via SNMP or switch management interfaces. By
admin on
2024-02-14
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478718
402297
A***s
Japan
Verified
Purchase
5 .0
2026-01-05
Integrated the LS-BL55311G-40I into our utility substation fiber network across a 34km link. Hot-swappable installation went smoothly on HP ProCurve switches. The module maintained clean optical eye diagrams and zero bit errors during a 72-hour continuous stress test under full load. Excellent long-reach solution :-)
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478718
402284
A***z
Iran, Islamic Republic of
Verified
Purchase
5 .0
2025-02-15
Upgraded our municipal surveillance backhaul using the LS-BL55311G-40I single-mode SFP. Paired seamlessly with the matching 1310nm-TX/1550nm-RX modules on the remote end. Real-time DOM telemetry allows our network engineers to monitor light levels remotely, preventing potential fiber degradation downtime. Truly impressive industrial optics at a fraction of major OEM prices. =D
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478718
402295
A***r
Republic of Korea
Verified
Purchase
5 .0
2025-02-06
Bench tested the LINK-PP 1G BiDi 1550nm/1310nm 40km DOM module using an EXFO optical power meter before field installation. Optical insertion loss was consistent across the 1.25G link, and DOM reported exact optical power within 0.2 dB of our test set. Highly satisfied with thermal stability and transmission distance :-D
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478718
402282
A***h
Bulgaria
Verified
Purchase
5 .0
2025-01-04
Replaced expensive OEM 1000BASE-EX BiDi transceivers in our municipal network. Handled sub-zero temperatures and high humidity without any link dropouts.
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478718
402281
J***r
Nepal
Verified
Purchase
4 .0
2024-11-18
The LS-BL55311G-40I optical transceiver performs as advertised across our 38km link, but delivery took two days longer than promised due to local carrier delay. Module itself is rock solid.
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478718
402290
N***n
France
Verified
Purchase
5 .0
2024-08-23
We deployed 16 units of the LINK-PP LS-BL55311G-40I across our regional campus backbone links. Operating on a single strand LC fiber run over 30km, optical power levels read -7.1 dBm via DDM/DOM on Cisco Catalyst 3850 switches. The 1550nm-TX/1310nm-RX configuration paired seamlessly with our existing 1310nm-TX modules, cutting fiber leasing expenses by half! :D
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478718
402294
B***s
Australia
Verified
Purchase
5 .0
2024-06-21
Deployed a batch of these industrial BiDi SFP transceivers in unheated solar-powered relay stations. Operating in extreme temperature swings between day and night, the laser bias current remains stable, and DDM accurately reports voltage and thermal specs. Highly recommended for rugged outdoor optical links ;)
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character.
478718
402293
S***s
Norway
Verified
Purchase
5 .0
2024-01-17
Required industrial temperature ratings (-40C to 85C) for roadside traffic monitoring enclosures in Canada. DOM diagnostics give reliable temperature and TX power metrics directly to our SNMP monitor. =)
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