The LINK-PP LS-BL31552G-20C 2.5G SFP BiDi module provides reliable 2.5Gbps optical transmission over single-mode fiber with a maximum reach of 20 kilometers. Operating with a wavelength pair of 1310nm (TX) and 1550nm (RX), it enables bidirectional communication over a single fiber strand.
LINK-PP Part Number
LS-BL31552G-20C
Vendor Name
LINK-PP
Form Factor
SFP
Max Data Rate
2.5Gbps
Wavelength
1310nm-TX/1550nm-RX
Max Cable Distance
20km
Connector
Simplex LC
Media
SMF
Transmitter Type
DFB
Receiver Type
PIN
TX Power
-5 to 0dBm
RX Power
-23 to -1dBm
Receiver Sensitivity
<-18dBm
Receiver Overload
-1dBm
Operating Temperature Range
0 to 70°C
Protocols
Fast Ethernet, Gigabit Fibre Channel, MSA Compliant
Key Features of LINK-PP LS-BL31552G-20C 2.5G SFP BiDi
The LINK-PP LS-BL31552G-20C 2.5G SFP BiDi module provides stable and cost-effective long-distance optical networking by supporting 2.5 Gbps data transmission over distances of up to 20 km and enabling full-duplex communication over a single fiber. Its hot-swappable SFP form factor and built-in DOM compatibility ensure easy installation, steady performance, and convenient real-time monitoring.
The LINK-PP LS-BL31552G-20C 2.5G SFP BiDi module features a quality DFB laser and PIN/TIA receiver with matched wavelength pairing for stable bidirectional communication. It ensures excellent signal integrity, strong EMI resistance, and low bit error rates even over long distances.
LS-BL31552G-20C: Reliable 2.5 Gbps Connectivity for Efficient Fiber Networks
The LINK-PP LS-BL31552G-20C 2.5G SFP BiDi module is an ideal solution for those who need reliable 2.5Gbps optical connectivity in enterprise, telecommunications, and campus networks.
LS-BL31552G-20C Module with 1310nm-TX/1550nm-RX Wavelength
Using precisely paired 1310nm transmit and 1550nm receive wavelengths, the LINK-PP LS-BL31552G-20C module enables efficient, long-distance, bidirectional communication over a single-mode fiber with improved transmission stability and reduced signal interference.
With a 20-kilometer transmission range, the LINK-PP LS-BL31552G-20C 2.5G SFP BiDi module is a strong fit for campus backbones, telecom access networks, and long-haul enterprise fiber connections.
LS-BL31552G-20C Module with Simplex LC Interface
The simplex LC connector accomplishes bidirectional operation through one port, which translates to less fiber consumption, neater cable organization, and lower overall deployment costs.
LS-BL31552G-20C Module with DOM for Real-Time Monitoring
The LINK-PP LS-BL31552G-20C module includes DOM functionality for accurate real-time tracking of temperature, voltage, and optical power levels, which further improves network visibility, simplifies maintenance, and speeds up troubleshooting.
LINK-PP modules are manufactured in accordance with ISO 9001 quality management standards and comply with CE, RoHS, and FCC certifications, ensuring safety, environmental responsibility, and full compliance with international industry requirements.
All-round optical, electrical, and environmental testing ensures consistent performance and dependable long-term operation in real-world deployment scenarios.
LS-BL31552G-20C Quality Certifications
Manufactured to fulfill global safety, quality, and reliability standards to ensure dependable performance in a wide range of networking scenarios.
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-BL31552G-20C Certified for Reliable Host-Device Compatibility
Compatibility with LINK-PP systems is verified to ensure seamless plug-and-play deployment, stable device recognition, and reliable long-term performance.
Rigorous Testing Ensures Reliable SFP Performance
Strict validation procedures guarantee stable optical transmission and dependable network operation. For further information, go to the LINK-PP Test Support Center.
Optical Spectrum Test
Spectrum validation helps ensure the module meets strict wavelength precision and optical compliance requirements.
Eye Pattern Test
Waveform inspection verifies signal clarity to reduce distortion and improve communication reliability.
Bit Error Rate Test
BER inspection confirms strong signal quality by reducing the risk of transmission errors.
Temperature Test
Heat resistance testing helps ensure stable transmission across a wide operating temperature range.
Product Shipping for LINK-PP LS-BL31552G-20C 2.5G SFP BiDi
Every LINK-PP module is shipped ready for immediate deployment via an efficient logistics system that protects product quality, accelerates turnaround, and ensures dependable global delivery.
Anti-Static Protective Packaging
Professional anti-static packaging minimizes electrostatic damage risks during shipping.
Shock-Resistant Transport Protection
Secure transport protection reduces the chance of product damage in transit.
Fast Order Processing and Dispatch
Efficient fulfillment systems enable prompt order confirmation, packing, and shipment dispatch.
Global Logistics and International Delivery
Reliable international carriers ensure secure and punctual delivery.
The LINK-PP LS-BL31552G-20C 2.5G SFP BiDi is suitable for SDH STM-16 systems, SONET OC-48 systems, 2x Fiber Channel applications, router and server interfaces, telecom access networks, enterprise backbone links, and various other optical communication deployments.
LS-BL31552G-20C 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-BL31552G-20C 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:
No, both sides of the single-mode fiber link must operate at matching line rates. Connecting a 2.5G SFP module to a 1G SFP module will result in a rate mismatch, preventing the optical interface from establishing link synchronization, even though the 1310nm/1550nm wavelengths match. By
admin on
2026-04-28
A:
On most enterprise switches and SFP+ ports, you will need to manually set the port speed to 2500Mbps and disable auto-negotiation, as standard SFP+ slots default to 10G or 1G auto-sensing mode unless explicitly configured for 2.5Gbps operation. By
admin on
2026-04-12
A:
The optical receiver overload for this module is -1 dBm, while its maximum TX launch power is 0 dBm. While a short run typically operates within safe margins without damaging the PIN photodiode, adding a 3dB or 5dB LC optical attenuator is recommended during bench testing to prevent receiver saturation and ensure long-term laser diode stability. By
admin on
2025-04-09
A:
Yes, the module fully complies with SFF-8472 standards. Digital Diagnostic Monitoring (DDM/DOM) maps standard I2C registers (A2h memory map), allowing Linux sysfs, ethtool, or network OS platforms like SONiC and VyOS to read real-time TX/RX optical power, module temperature, voltage, and laser bias current. By
admin on
2024-09-07
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485567
445590
T***r
Japan
Verified
Purchase
5 .0
2026-07-15
Running these for campus fiber link between two distribution switches 4km apart. TX/RX optics are within specifications and BER test passed without dropped packets.
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485567
445587
L***n
New Zealand
Verified
Purchase
4 .0
2026-06-25
Modules work great and hit full 2.5Gbps speed, but the anti-static packaging bag was slightly torn during shipping. Luckily the LC dust cap kept the optical interface clean.
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485567
445601
E***s
Libyan Arab Jamahiriya
Verified
Purchase
4 .0
2026-06-02
Good performance and solid DDM readings on Mikrotik CRS switches. Shipping took a couple of days longer than expected due to customs clearance, but the optics themselves are spot-on.
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485567
225778
A***s
Hungary
Verified
Purchase
5 .0
2025-05-14
Upgraded our 2.5G optical transceiver infrastructure across 8 building uplinks. High compatibility with generic and brand-name switches, hot-swappable without interrupting adjacent ports. :-)
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485567
225789
J***r
South Africa
Verified
Purchase
5 .0
2025-04-24
Upgraded our WISP base station backhaul from 1G to 2.5G using these BiDi modules. Simplex LC saves us so much fiber patch cable clutter in tight outdoor enclosures.
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485567
445581
R***e
Netherlands
Verified
Purchase
5 .0
2025-03-21
Deployed across multiple remote cabinet locations for metro Ethernet aggregation. Running 24/7 inside commercial temperature range (0 to 70°C) with zero CRC errors.
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485567
226011
R***y
New Zealand
Verified
Purchase
5 .0
2024-11-22
Had a quick query on DFB transmitter spectral width for our multiplexed link setup, and customer support answered within an hour with full factory test reports. =)
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485567
445582
M***n
United Kingdom
Verified
Purchase
5 .0
2024-08-28
Best price I could find. Called to confirm I was ordering the correct part and actually got to speak to someone. I ordered the part and it was delivered super Fast. Everything is working great! I would recommend these folks.
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485567
226014
C***s
Turkey
Verified
Purchase
5 .0
2024-08-16
Web site had incorrect inventory... I made my purchase, then was called about an hour later and informed about the inventory issue. Customer service resolved this issue with me over the phone quickly and i received my order on time (with the exception of the missing item).
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485567
225776
A***t
Austria
Verified
Purchase
5 .0
2024-07-14
Perfect solution for single-mode fiber conservation in enterprise networking. 1310nm-TX and 1550nm-RX paired effortlessly with the matching complementary BiDi module on the opposite end.
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