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The LINK-PP LS-BL55491G-A5C is a high-performance 1.25Gbps BiDi SFP transceiver engineered for long-haul optical networking. This single-mode optical module utilizes advanced 1550nm DFB laser and APD photodiode technologies to achieve an extraordinary 150km reach. Operating on a standard 3.3V power supply, it guarantees stable gigabit ethernet transmission across expansive infrastructures.
| LINK-PP Part Number | LS-BL55491G-A5C | Vendor Name | LINK-PP |
| Form Factor | SFP | Max Data Rate | 1.25Gbps |
| Wavelength | 1550nm-TX/1490nm-RX | Max Cable Distance | 150km |
| Connector | Simplex LC | Media | SMF |
| Transmitter Type |
DFB | Receiver Type |
APD |
| TX Power | 0 to +5dBm | RX Power | -28 to -1dBm |
| Receiver Sensitivity | <-34dBm | DOM Support | Yes |
| Operating Temperature Range | 0 to 70°C | Protocols |
SFP MSA、SFF-8472 |
Discover the exceptional capabilities of this hot-pluggable WDM SFP transceiver. Engineered for minimal power consumption and superior optical performance, the 1G single fiber module delivers consistent 1.063Gbps Fiber Channel and 1.25G Gigabit Ethernet connectivity. It operates reliably within commercial temperatures spanning zero to seventy degrees Celsius.
This robust 1G bidirectional SFP optical module dramatically reduces fiber cabling costs by transmitting and receiving data over a single strand of single-mode fiber. It perfectly complies with standard SFP MSA regulations for seamless network integration.
Tailored specifically for Metropolitan Area Networks and long-haul telecommunication systems, this 1G SMF transceiver ensures ultra-reliable gigabit optical links. It seamlessly connects disparate corporate campuses, remote data centers, and enterprise network switches across vast geographical distances.
Operating with an asymmetrical wavelength design, this optical transceiver features a premium 1550nm DFB laser transmitter and a highly sensitive 1490nm APD receiver. This dual-wavelength technology successfully prevents signal interference during simultaneous upstream and downstream data transmission.
Overcoming extreme distance limitations, this extended-reach SFP module achieves an incredible 150km transmission distance on standard single-mode fiber. The integrated APD photodetector provides exceptional receiver sensitivity, maintaining zero signal loss across incredibly long rural network spans.
Designed featuring a simplex LC receptacle, this bidirectional fiber optic transceiver enables quick, secure, and physically compact hardware connections. The single LC connector framework maximizes port density on enterprise routers while minimizing overall fiber optic infrastructure expenses.
Equipped with advanced Digital Optical Monitoring, this intelligent SFP module complies with SFF-8472 standards. Network administrators can easily track real-time operational metrics including laser temperature, voltage supply, transmitter bias current, and continuous optical power input levels.
Every single LINK-PP 1.25Gbps optical transceiver perfectly adheres to stringent international manufacturing standards, ensuring absolute compliance with Class I laser safety regulations and global environmental sustainability protocols.
We implement a comprehensive quality control framework for every single-mode SFP module. Each manufactured transceiver undergoes continuous automated inspection to guarantee flawless long-distance fiber transmission.
This robust commercial-grade BiDi transceiver proudly carries comprehensive CE, FCC, UKCA, UL, and REACH certifications. Furthermore, the RoHS compliant module guarantees environmentally responsible telecommunications deployment universally.
Rigorously evaluated across diverse networking equipment, this MSA compatible transceiver guarantees flawless interoperability. It operates seamlessly inside standard gigabit switches, industrial routers, and enterprise fiber optic media converters.
Our dedicated quality assurance laboratories subject every optical module to comprehensive technical evaluations, maximizing gigabit network stability and minimizing unexpected fiber link failures.
We precisely verify the 1550nm DFB laser wavelength and side-mode suppression ratio parameters.
Advanced oscilloscopes confirm excellent transmitter signal integrity and data output swing differential quality.
Continuous data stream analysis ensures zero data loss during massive gigabit ethernet transmissions.
Strict thermal chamber cycles guarantee stable component functionality across zero to seventy degrees.
We prioritize secure global distribution channels to ensure your advanced gigabit optical transceivers arrive rapidly, safely, and ready for immediate network installation.
Premium electrostatic discharge bags perfectly shield the sensitive internal APD microcomponents.
Custom molded physical buffers actively prevent dangerous mechanical damage during transit.
Automated warehouse management accelerates the immediate dispatch of your optical modules.
Trusted express courier partnerships guarantee fast worldwide delivery for critical infrastructure.
Integrating this gigabit single-mode transceiver is exceptionally straightforward. Technicians simply slide the hot-pluggable BiDi module into any available SFP port, connect the simplex LC patch cord, and instantly establish a stable 150km long-distance telecommunications link without configuration.
LINK-PP provides professional technical support, including pre-sales consultation, compatibility verification, and post-deployment troubleshooting to ensure smooth network operation.
Professional technical guidance to help customers select the most suitable LS-BL55491G-A5C modules based on network architecture and application requirements.
Compatibility checks and validation to ensure seamless operation with Cisco switches and other supported networking platforms.
Step-by-step support for installation, configuration, and initial deployment to ensure stable and correct operation.
Ongoing technical support throughout the product lifecycle to ensure reliable performance in enterprise and carrier-grade networks.
LINK-PP provides after-sales support for the smooth deployment and reliable operation of the optical modules.
15-day no-reason return and refund
Free replacement for dead-on-arrival (DOA) or defective items within the initial period
Free repair services for manufacturing defects throughout the warranty period
Warranty exclusions and conditions apply
Compatible | LINK-PP | LINK-PP | LINK-PP | LINK-PP | LINK-PP | LINK-PP |
Data Rate (Max) | 1.25Gbps | 1.25Gbps | 1.25Gbps | 1.25Gbps | 1.25Gbps | 1.25Gbps |
Wavelength | 1550nm-TX/1490nm-RX | 1550nm-TX/1490nm-RX | 1550nm-TX/1490nm-RX | 1550nm-TX/1490nm-RX | 1550nm-TX/1490nm-RX | 1550nm-TX/1490nm-RX |
Connector | Simplex LC | Simplex LC | Simplex LC | Simplex LC | Simplex LC | Simplex LC |
Cable Distance (Max) | 150km | 160km | 100km | 120km | 10km | 80km |
Cable Type | SMF | SMF | SMF | SMF | SMF | SMF |
TX Power | 0 to +5dBm | 0 to +5dBm | 0 to +5dBm | 0 to +5dBm | 0 to +5dBm | 0 to +5dBm |
Receiver Sensitivity | -28 to -1dBm | -28 to -1dBm | -28 to -1dBm | -28 to -1dBm | -26 to -1dBm | -26 to -1dBm |
Operating Temperature | 0 to 70°C | 0 to 70°C | 0 to 70°C | 0 to 70°C | 0 to 70°C | 0 to 70°C |
Form Factor | SFP | SFP | SFP | SFP | SFP | SFP |
Transmitter Type | DFB | DFB | DFB | DFB | DFB | DFB |
Receiver Type | APD | APD | PIN | APD | PIN | PIN |
DOM Support | Yes | Yes | Yes | Yes | Yes | Yes |
Protocols | SFP MSA、SFF-8472 | SFP MSA、SFF-8472 | Fast Ethernet, Gigabit Fibre Channel, MSA Compliant | Fast Ethernet, Gigabit Fibre Channel, MSA Compliant | Fast Ethernet, Gigabit Fibre Channel, MSA Compliant | Fast Ethernet, Gigabit Fibre Channel, MSA Compliant |
| Pictures | ID# | Description | Price | Stock | Add to Cart |
Q: We're deploying outdoor cabinets for rural broadband. This says 0 to 70°C, but do you have an industrial-grade version that can handle sub-zero freezing temperatures? By D***s on 2026-05-09
A: This commercial version (0 to 70°C) is great for climate-controlled or standard indoor/outdoor cabinets. However, if you need extreme weather resistance, we offer the exact same spec in our industrial version (LS-BL55491G-A5I) supporting -40°C to 85°C. By admin on 2026-05-09
Q: Does this require dual LC or simplex LC patch cords? We only have a single strand of SMF available for the run. By P***z on 2026-02-18
A: You're in luck! This is a BiDi (WDM) module, meaning it transmits (1550nm) and receives (1490nm) over a single strand of single-mode fiber. It uses a Simplex LC connector, saving you up to 50% on fiber cabling limits. By admin on 2026-02-18
Q: Hey there, we run a mixed environment with Cisco and Mikrotik switches. Will this 1G BiDi SFP work smoothly across both without triggering "unsupported transceiver" errors? By D***r on 2026-01-29
A: Yes, absolutely! The LS-BL55491G-A5C is fully OEM compatible and flashed to work seamlessly across major brands like Cisco, Mikrotik, and Juniper without throwing hardware errors. Just plug and play. By admin on 2026-01-29
Q: Are these 150km modules really as reliable as the expensive original brand optics? We need extreme stability for our metropolitan area network. By S***t on 2025-09-19
A: They are! Our transceivers use premium 1550nm DFB lasers and highly sensitive APD receivers, delivering the exact same core performance and 1.25Gbps throughput as original brands, but at a fraction of the cost. Extremely cost-effective for enterprise setups. By admin on 2025-09-19
Q: Our procurement strictly requires adherence to industry specs. Does this single-mode module fully comply with SFP MSA and support standard DOM/DDM monitoring? By A***n on 2025-05-29
A: Yes, it strictly adheres to standard SFP MSA and SFF-8472 protocols. The built-in DDM/DOM allows your network admins to monitor voltage, temperature, and RX/TX power in real-time, ensuring full industry compliance. By admin on 2025-05-29
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