TRENDnet Compatible 1G SFP BiDi (1310nm-TX/1550nm-RX,20km,LC SMF,DOM,Compatible With TEG-MGBS20D3)
P/N:
LS-BL31551G-20C
Manufacturer:
LINK-PP
Compatible Brand:
TRENDnet
Compatible P/N:
TEG-MGBS20D3
- Compatible Brands: TRENDnet
- Form Factor: SFP
- Data Rate: 1G
- Distance: ≤20km
- Type: Single Mode
- Connector: Simplex LC
- Wavelength: 1310nm-TX/1550nm-RX
- P/N: LS-BL31551G-20C
- Manufacture: LINK-PP
- Compatible Brand: TRENDnet
- Compatible P/N: TEG-MGBS20D3
Optical Transceivers & SFP/QSFP Cages Solutions
- 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 Connectivity & High-Speed Interface Solutions
- 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
Signal Integrity & Network Reliability Engineering
- 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
Before You Deploy: BiDi Pairing & Simplex Cabling Checklist
Deploying BiDi (Bidirectional) optics instantly doubles your fiber capacity, but requires strict Layer-1 discipline. Before deploying in your campus network, verify the following:
- Mandatory Asymmetrical Pairing: This is the D3 (Downstream) module transmitting at 1310nm. It MUST be paired with the D5 (Upstream) TEG-MGBS20D5 equivalent (Tx:1550nm) at the remote end. Two D3 modules will not link together.
- Simplex LC Cabling: Ensure your ODF (Optical Distribution Frame) is equipped with Simplex LC/UPC patch cords. Standard duplex cables physically will not fit.
- Lab Testing Safety: With a robust PIN Receiver Overload threshold of -1.0 dBm, you can safely connect this BiDi pair back-to-back on a lab bench using a short 2-meter patch cord without using optical attenuators.
Comprehensive Technical Specifications
Constructed with a highly reliable FP laser transmitter and a PIN photodiode integrated with a TIA (trans-impedance preamplifier) and MCU control unit.
| LINK-PP Part Number | LS-BL31551G-20C | TRENDnet Compatible | TEG-MGBS20D3 |
| Form Factor | SFP | Max Data Rate | 1.25Gbps |
| Wavelength | 1310nm-TX/1550nm-RX | Max Cable Distance | 20km |
| Connector | Simplex LC | Optical Components | FP BiDi |
| Media | SMF | DOM Support |
Yes |
| TX Power | -9 to 0dBm | RX Power | -23 to -1dBm |
| Receiver Sensitivity | <-23dBm | Receiver Overload | -1dBm |
| Operating case temperature | 0 to 70°C | Protocols |
Fast Ethernet, Gigabit Fibre Channel, MSA Compliant |
Optical Power & Link Budget Analysis
Ensure your structured campus cabling does not exceed the 14dB optical link budget provided by this transceiver.
| Parameter | Specification Limit | Diagnostic Note |
|---|---|---|
| Transmit Power (Tx) | -9.0 dBm to 0.0 dBm | Stable FP laser output optimized for 1310nm single-mode windows. |
| Receiver Sensitivity (Rx) | < -23.0 dBm | Highly sensitive TIA receiver maintains zero-packet-loss over 20km. |
| Receiver Overload | -1.0 dBm | Resilient to signal saturation; optical attenuators are generally not required. |
| Optical Link Budget | 14.0 dB | (Calculated from minimum Tx of -9.0dBm and Rx sensitivity of -23.0dBm). |
Procurement Strategy: Why Use BiDi for IP Surveillance?
Slashing Fiber Trenching Costs by 50%: When deploying outdoor PoE IP cameras or expanding a campus network across multiple buildings, trenching new fiber ducts is the most expensive part of the project. By utilizing standard duplex dual-fiber SFPs, you consume two strands per link. Implementing WDM BiDi optics allows you to run Gigabit Ethernet over a single strand of fiber. If you have an existing 6-strand fiber cable, BiDi optics instantly upgrade your capacity from 3 links to 6 links, drastically reducing infrastructure CAPEX.
Engineering Validation: Verifying DOM in SMB Environments
Unlike enterprise core routers that rely on complex CLI commands, TRENDnet Edge switches and similar SMB open networking platforms typically utilize Web Smart GUIs or SNMP polling to monitor optical health. If you experience link flapping, access the switch's DDM (Digital Diagnostic Monitoring) interface.
Diagnostic Baseline (Rx Power): When viewing the optical diagnostics in your switch's web interface, locate the Rx Power (Received Optical Power). Because this BiDi module features an advanced PIN receiver with a sensitivity of -23.0 dBm:
- If Rx reads -15.0 dBm: You have a highly secure 8.0 dB operating margin. The link is perfectly healthy.
- If Rx reads -22.0 dBm or lower: The link is critically weak. Inspect the simplex LC connector for dust, or check the fiber route for excessive macro-bends.
Frequently Asked Questions
Which module should I pair with the TEG-MGBS20D3?
This is a downstream (D3) BiDi transceiver that transmits at 1310nm and receives at 1550nm. It must be paired with the upstream (D5) TEG-MGBS20D5 module, which transmits at 1550nm and receives at 1310nm, at the remote end of the fiber link.
Can I use this BiDi module for outdoor IP security cameras?
Yes. Although this module is rated for a commercial operating temperature range of 0°C to 70°C, it is commonly deployed in environmentally controlled outdoor NEMA enclosures to provide Gigabit uplinks for PoE surveillance switches.
Does it require a special type of fiber cable?
Yes. This module requires a simplex Single-Mode Fiber (SMF) patch cable with an LC/UPC connector. Since BiDi transceivers use a single optical port for both transmission and reception, a simplex fiber connection is required.
Is it plug-and-play with TRENDnet Web Smart switches?
Yes. The EEPROM is programmed according to MSA (Multi-Source Agreement) standards, enabling plug-and-play operation with TRENDnet Web Smart and Managed switches without vendor compatibility issues.
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.
1G 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 TEG-MGBS20D3 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.
ISO 9001 Quality Management
Manufactured under certified quality management processes to ensure consistent product quality and production control.
IEEE 802.3 Standards Compliance
Designed in accordance with applicable networking and Ethernet standards, including IEEE specifications where relevant.
RoHS Compliance
Manufactured using materials that support restrictions on hazardous substances for global market requirements.
REACH Compliance
Material declarations and supply chain processes support applicable REACH regulatory requirements.
Product Safety Assurance
Selected products support recognized safety and reliability requirements for networking applications.
Reliability Verification Testing
Products undergo verification and quality testing to support stable operation in enterprise, telecom, and industrial environments.
1G SFP Warranty and After-Sales Service
LINK-PP provides warranty coverage and after-sales support to help ensure stable operation and long-term product performance.
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
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