The LINK-PP LS-BL55491G-A2I is an industrial-grade 1G BiDi SFP transceiver engineered for rugged environments. This 1.25Gbps optical module supports a massive 120km transmission distance over single-mode fiber. Operating seamlessly between -40°C and 85°C, this high-performance Gigabit Ethernet solution guarantees stable, long-reach connectivity for critical networking infrastructure.
LINK-PP Part Number
LS-BL55491G-A2I
Vendor Name
LINK-PP
Form Factor
SFP
Max Data Rate
1.25Gbps
Wavelength
1550nm-TX/1490nm-RX
Max Cable Distance
120km
Connector
Simplex LC
Media
SMF
Transmitter Type
DFB
Receiver Type
APD
TX Power
0 to +5dBm
RX Power
-28 to -1dBm
Receiver Sensitivity
<-32dBm
DOM Support
Yes
Operating Temperature Range
-40 to 85°C
Protocols
Fast Ethernet, Gigabit Fibre Channel, MSA Compliant
Key Features of LINK-PP LS-BL55491G-A2I 1G BiDi SFP
This powerful 1G BiDi SFP transceiver boasts advanced features for demanding network architectures. It combines an ultra-sensitive APD photodiode with a 1550nm DFB laser to ensure exceptional signal integrity. The hot-pluggable design ensures quick deployments and seamless hardware upgrades.
As a premier 1G BiDi SFP optical module, it delivers 1.25Gbps data rates efficiently. The transceiver utilizes advanced WDM technology to transmit and receive signals on a single strand of fiber, optimizing your cabling infrastructure.
LS-BL55491G-A2I: 1G Connectivity for Base Station Backhaul
Designed to withstand harsh outdoor conditions, this industrial SFP is perfect for telecom operators. It provides robust 1G connectivity for base station backhaul, ensuring reliable data transmission in extreme temperatures across expansive mobile networks.
LS-BL55491G-A2I Module with 1550nm-TX and 1490nm-RX Wavelength
This optical transceiver features a precisely calibrated 1550nm-TX and 1490nm-RX wavelength configuration. Utilizing a premium DFB laser transmitter, it maximizes optical link budgets while maintaining exceptional signal clarity over extended optical fiber connections.
Engineered for ultra-long-haul applications, this optical module confidently supports up to 120km transmission distances on single-mode fiber. The integrated APD receiver provides superior sensitivity, allowing Gigabit Ethernet networks to span vast geographic distances seamlessly.
LS-BL55491G-A2I Module with Simplex LC Interface
The transceiver is equipped with a standard simplex LC interface, fully compliant with SFP MSA specifications. This single LC receptacle allows bidirectional communication over one fiber, significantly reducing overall optical cabling deployment costs.
LS-BL55491G-A2I Module with DOM for Real-Time Monitoring
Featuring integrated Digital Optical Monitoring, this module allows administrators to track operational parameters instantly. The DOM functionality provides vital real-time data on temperature, voltage, and optical power levels to proactively maintain network health.
LINK-PP LS-BL55491G-A2I 1G SFP Certification
Every LINK-PP LS-BL55491G-A2I 1G SFP undergoes rigorous validation to meet strict industry standards. This ensures optimal performance and safety for enterprise and industrial fiber optic networks.
Our comprehensive quality testing program ensures each transceiver performs flawlessly. We evaluate electrical characteristics and optical integrity to guarantee zero packet loss during critical data transmissions.
LS-BL55491G-A2I Quality Certifications
This high-performance optical module is compliant with RoHS directives and satisfies Class I laser safety requirements. These certifications guarantee environmentally friendly and secure network operations.
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-BL55491G-A2I Certified for Reliable Host-Device Compatibility
Fully compliant with SFF-8472 and MSA standards, this module guarantees plug-and-play interoperability. It is certified for seamless integration with major switches and networking routers worldwide.
Rigorous Testing Ensures Reliable SFP Performance
We conduct strict laboratory evaluations on every module. This uncompromising attention to detail guarantees long-term stability and outstanding Gigabit Ethernet connectivity.
Optical Spectrum Test
This test verifies the precise 1550nm center wavelength to prevent optical channel interference.
Eye Pattern Test
We analyze the transmitter output to confirm clear, distortion-free optical signals at 1.25Gbps.
Bit Error Rate Test
Ensures strict adherence to BER standards over the maximum 120km transmission distance.
Temperature Test
Validates flawless continuous operation across extreme industrial temperatures from -40°C up to 85°C.
Product Shipping for LINK-PP LS-BL55491G-A2I 1G SFP
We employ professional logistics solutions to ensure your optical transceivers arrive safely. Every shipment is carefully prepared to prevent transit damage.
Anti-Static Protective Packaging
Each transceiver is sealed in premium anti-static bags to prevent electrical damage.
Shock-Resistant Transport Protection
We use specialized custom foam inserts to absorb impact during global transit.
Fast Order Processing and Dispatch
Streamlined warehouse operations guarantee rapid packaging and prompt dispatch of your order.
Global Logistics and International Delivery
Partnering with top couriers provides reliable and trackable worldwide shipping solutions.
Installing this hot-pluggable module is completely straightforward. Simply insert the transceiver into any MSA-compliant switch port until it clicks, then connect your single-mode fiber to the simplex LC receptacle to instantly establish your network link.
LS-BL55491G-A2I 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-BL55491G-A2I 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, we provide aggressive tiered pricing for B2B bulk purchases. For an order of 300 units, please reach out to our sales team directly, and we will apply a substantial volume discount to help you stay within budget. By
admin on
2026-05-12
A:
Not at all. The LS-BL55491G-A2I features strict OEM compatibility coding. It has been extensively tested to plug-and-play seamlessly across major brands like Cisco, Juniper, and Arista without throwing compatibility errors. By
admin on
2026-02-08
A:
This transceiver is equipped with a Simplex LC interface. To guarantee the maximum 120km reach with the required optical budget, you must use a standard 9/125碌m Single-Mode Fiber (SMF) patch cable. By
admin on
2026-01-07
A:
Absolutely. This transceiver is fully compliant with the SFP Multi-Source Agreement (MSA), IEEE 802.3z standards, and holds RoHS certification, ensuring it strictly meets all global industry regulations for enterprise networking. By
admin on
2025-12-15
Please write comments with more than three
character.
478906
364693
D***s
Ecuador
Verified
Purchase
5 .0
2026-01-18
We need industrial grade -40 to 85°C optics for outdoor cabinets. This LS-BL55491G-A2I SFP handles the 1550nm-TX/1490nm-RX split flawlessly over a 120km SMF run. Absolute lifesaver!
Please write comments with more than three
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478906
364694
A***z
France
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Purchase
5 .0
2025-09-30
Sourced these for a massive data center machine room batch deployment. Zero packet loss on the 1.25Gbps link, and the OEM compatibility is perfectly spot on. Great TCO overall.
Please write comments with more than three
character.
478906
364678
P***r
Thailand
Verified
Purchase
5 .0
2025-04-01
Upgraded my home lab, connecting a 10G NAS via this 1G Simplex LC module for long-reach backup. Surprisingly low latency, and the DFB/APD combo provides stellar RX sensitivity. Unbeatable value!
Please write comments with more than three
character.
478906
364677
T***g
Russian Federation
Verified
Purchase
5 .0
2025-02-21
Multi-brand switch compatibility tests passed with flying colors. Deployed 50 of these 1G BiDi SFPs for campus fiber networking. The built-in DOM feature is huge for real-time monitoring.
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