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H3C Compatible 1G SFP BiDi (1310nm-TX/1490nm-RX,40km,LC SMF,DOM,Compatible With SFP-GE-PX40-U-SM1310-A)

P/N:

LS-BL31491G-40C

Manufacturer:

LINK-PP

Compatible Brand:

H3C

Compatible P/N:

SFP-GE-PX40-U-SM1310-A

Compatible Brands: H3C
Form Factor: SFP
Data Rate: 1.25G
Distance: ≤40km
Type: Single Mode
Connector: Simplex LC
Wavelength: 1310nm-TX/1490nm-RX
P/N: LS-BL31491G-40C
Manufacture: LINK-PP
Compatible Brand: H3C
Compatible P/N: SFP-GE-PX40-U-SM1310-A

Optical Domain

Optical Transceivers & SFP/QSFP Cages Solutions

Complete optical interconnect ecosystem including high-speed transceivers and precision-engineered SFP/QSFP cages for data center and telecom applications.

Optical transceivers: SFP / SFP+ / SFP28 / QSFP+ / QSFP28 / QSFP-DD / OSFP
SFP cages & QSFP cages for high-density switch design
High-speed optical connector and receptacle structures
Mechanical + thermal + EMI optimization for optical interfaces
Designed for 10G / 100G / 200G / 400G / 800G data center networks

Ethernet Domain

RJ45 Connector with 10/100/1000M Magnetic

Ethernet Connectivity & High-Speed Interface Solutions

Integrated Ethernet connectivity components designed for enterprise, industrial, and high-performance networking systems.

Integrated RJ45 MagJack connectors for high-speed Ethernet
Modular Jack solutions for scalable network port design
High-performance LAN transformer integration
Support for 1G / 2.5G / 5G / 10G Ethernet applications

Magnetics

Signal Integrity & Network Reliability Engineering

Magnetics and system-level design ensuring stable signal transmission and long-term reliability in mission-critical networking environments.

LAN transformers for signal isolation and impedance matching
PoE and high-speed Ethernet magnetic components
EMI/EMC optimization for network stability
Designed for hyperscale data centers and telecom systems

H3C SFP-GE-PX40-U-SM1310-A Compatible LINK-PP LS-BL31491G-40C SFP 1Gbps BiDi Simplex LC/UPC Optical Transceiver Module(SMF, 1310nm-TX/1490nm-RX, 40km, LC, DOM)

The LS-BL31491G-40C SFP transceivers are high performance, cost effective modules supporting data rate of 1.25Gbps and 40km transmission distance with SMF. The transceiver consists of three sections: a DFB laser transmitter, a PIN photodiode integrated with a trans-impedance preamplifier (TIA) and MCU control unit. All modules satisfy class I laser safety requirements. The transceivers are compatible with SFP Multi-Source Agreement and SFF-8472 digital diagnostics functions

LINK-PP Part Number	LS-BL31491G-40C	H3C Compatible	SFP-GE-PX40-U-SM1310-A
Form Factor	SFP	Max Data Rate	1.25Gbps
Wavelength	1310nm-TX/1490nm-RX	Max Cable Distance	40km
Connector	Simplex LC	Optical Components	DFP BiDi
Media	SMF	DOM Support	Yes
TX Power	-5 to 0dBm	RX Power	-23 to -1dBm
Receiver Sensitivity	<-24dBm	Receiver Overload	-1dBm
Operating case temperature	0 to 70°C	Protocols	Fast Ethernet, Gigabit Fibre Channel, MSA Compliant

Quality Testing Program

Optical Transceivers Testing

Take advantage of our testing program to evaluate the reliability and performance of our optical transceivers.

Quality Certifications

We control the quality of our products,including our strict qualification of manufacturers,quality control process and production technology,and compliance with certification and safet standards.At present,our products meet the industry standards and mainstream quality certification,such as ISO 9001,CE,RoHS,FCC,etc.

Features

LINK-PP 1G Connectivity for Data Centers

The LINK-PP 1G SFP transceivers deliver low-power, high-reliability, and cost-effective connectivity for Gigabit Ethernet networks.They ensure stable data transmission and flexible deployment across diverse network architectures.An ideal choice for enterprise access, aggregation, and data center upgrades requiring efficient 1G performance.

Certified through host-device testing for dependable interoperability

Each transceiver undergoes strict quality assurance and compatibility testing within the intended switch environment, ensuring not only flawless operation but also long-term stability and reliability in demanding network applications.

Hot Pluggable SFP MSA Compliant

Digital Optical Monitoring

Class 1 FDA Laser Safety

Rigorous Testing Ensures Reliable Performance

Every Link-PP optical module undergoes a thorough qualification process with state-of-the-art equipment, guaranteeing superior quality and dependable operation. Learn more at our [Link-PP Test Support Center].

Optical Spectrum Test

No Packet Loss & CRC

Eye Pattern Test

Mask Margin > 20%

Bit Error Rate Test

BER 1E-12

Temperature Test

0~70°C

Enable Seamless Connectivity for Your Network

Reconfiguring the transceiver to work with different brands, Link-PP offers flexibility in stock costs.

Model Comparison Table

	LS-BL31551G-03C	LS-BL31491G-10C	LS-BL49311G-20C	LS-BL55311G-40C	LS-BL49551G-80C	LS-BL49551G-A2I

Data Rate (Max)	1.25Gbps	1.25Gbps	1.25Gbps	1.25Gbps	1.25Gbps	1.25Gbps
Wavelength	1310nm-TX/1550nm-RX	1310nm-TX/1490nm-RX	1490nm-TX/1310nm-RX	1550nm-TX/1310nm	1490nm-TX/1550nm	1490nm-TX/1550nm-RX
Cable Distance (Max)	3km	10km	20km	40km	80km	120km
Cable Type	SMF	SMF	SMF	SMF	SMF	SMF
TX Power	-15 ~ -8dBm	-9 ~ 0dBm	-9 ~ 0dBm	0 ~ +5dBm	0 ~ +5dBm	0 ~ +5dBm
Receiver Sensitivity	<-23dBm	<-23dBm	<-23dBm	<-24dBm	<-26dBm	<-32dBm
Operating Temperature	0 to 70°C	0 to 70°C	0 to 70°C	0 to 70°C	0 to 70°C	-40 to 85°C

Packaging, Shipping and Global Delivery for Networking Products

Anti-static packaging, shock-resistant protection, fast order dispatch, and reliable worldwide delivery for all LINK-PP networking products.

Anti-Static Protective Packaging

Protect networking products from electrostatic discharge and handling-related damage.

Shock-Resistant Transport Protection

Protect products against physical impacts during storage and international transportation.

Fast Order Processing and Dispatch

Accelerate order handling to ensure quick warehouse deployment.

Global Logistics and International Delivery

Ship products efficiently to customers across worldwide locations.

1.25G SFP Technical Support and Deployment Assistance

LINK-PP provides expert technical support, from product selection and compatibility verification to deployment and long-term operation.

Pre-Sales Technical Consultation

Technical consultation to help you verify SFP-GE-PX40-U-SM1310-A compatibility and select the appropriate product for your application.

Compatibility Verification Support

Verification support to help ensure compatibility with your equipment, applications, and deployment requirements.

Deployment & Installation Assistance

Comprehensive step-by-step guidance for installation, configuration, and initial setup, ensuring accurate deployment and reliable, stable operation from the start.

Long-Term Technical Assurance

Ongoing technical support throughout the product lifecycle, delivering long-term stability for enterprise and carrier-grade networks.

Industry Standards, Compliance and Quality Assurance

LINK-PP products are manufactured under recognized quality management systems and designed to support applicable industry standards, regulatory compliance, and long-term deployment requirements, including IEEE 802.3, RoHS, REACH, ISO 9001, and ISO 14001 where applicable.