LS-CW551G-20C 1G SFP delivers efficient 1550nm CWDM connectivity with full support for data throughput up to 1.25Gbps. Leveraging an advanced CWDM DFB transmitter alongside a PIN photodetector, it facilitates long-haul SMF coverage extending to 20km. Built-in real-time digital optical monitoring ensures precise system diagnostic tracking within a standard commercial operating temperature of 0 to +70°C.
Juniper Part Number
LS-CW551G-20C
Vendor Name
LINK-PP
Form Factor
SFP
Max Data Rate
1.25Gbps
Wavelength
1550nm
Max Cable Distance
20km
Connector
Duplex LC
Media
SMF
Transmitter Type
DFB
Receiver Type
PIN
TX Power
-5 to 0dBm
RX Power
-26 to -1dBm
Receiver Sensitivity
-24dBm
Receiver Overload
-1dBm
EMC (Electromagnetic Compatibility)
Supported
DOM Support
Yes
Operating Temperature Range
0 to 70°C
Protocols
SFP MSA、SFF-8472
Key Features of Juniper LS-CW551G-20C Compatible LINK-PP 1.25G SFP
Juniper LS-CW551G-20C Compatible LINK-PP brings together essential optical technologies, including CWDM wavelength precision and real-time telemetry, to deliver reliable 1G data transmission over single-mode fiber up to 20km. Designed for standard commercial operating environments, this module offers seamless hardware compatibility and effective network monitoring across modern enterprise infrastructures.
Featuring a hot-pluggable SFP footprint, this transceiver can be installed or replaced without interrupting host equipment operations. The module strictly complies with SFP MSA standards to ensure broad interoperability across compliant network switches and routers.
LS-CW551G-20C: 1 Gbps Connectivity for Network Aggregation Layers
Line-rate 1Gbps throughput enables efficient traffic aggregation and smooth data routing across intermediate network switches. This stable bandwidth capacity makes the module ideal for distribution layer switching and campus network consolidation.
LS-CW551G-20C Module with CWDM Technology for Fiber Efficiency
Coarse Wavelength Division Multiplexing allows multiple data channels to share existing single-mode fiber paths without laying additional cabling. Utilizing CWDM technology helps network operators expand fiber capacity and lower total deployment costs.
LS-CW551G-20C Module with 1550nm Wavelength
Operating at the 1550nm optical channel provides optimal light propagation through single-mode fiber with minimal signal attenuation. This specific wavelength specification ensures clear signal integrity for medium-to-long reach optical links.
LS-CW551G-20C Module Supporting 20km Transmission
An integrated CWDM DFB laser combined with a PIN photodetector supports stable optical links spanning distances up to 20km. Extended reach capacity makes it a reliable choice for connecting campus buildings and distant distribution cabinets.
LS-CW551G-20C Module with Duplex LC Interface
Industry-standard duplex LC connectors deliver secure physical fiber connections and excellent insertion loss characteristics. The dual-fiber optical interface simplifies cable routing and fits neatly into high-density patch panels.
LS-CW551G-20C Module with DOM for Real-Time Monitoring
Digital Optical Monitoring functionality delivers continuous tracking of key operational metrics like temperature, supply voltage, laser bias current, and optical power. Fully compatible with SFF-8472 digital diagnostics standards, it simplifies routine network maintenance and proactive fault prevention.
LS-CW551G-20C 1G CWDM SFP module meets strict international standards, including ISO 9001, CE, RoHS, and FCC certifications. These compliance standards ensure excellent product quality, environmental safety, and reliable operational performance.
Every CWDM module undergoes rigorous signal integrity testing and optical power checks before leaving the factory. This thorough evaluation guarantees line-rate performance and consistent long-term stability.
LS-CW551G-20C Quality Certifications
Official regulatory documentation verifies compliance with international safety, environmental, and electromagnetic standards. These verified credentials confirm that each optical module meets required manufacturing specifications for commercial deployment.
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-CW551G-20C Certified for Reliable Host-Device Compatibility
Extensive vendor hardware testing verifies seamless plug-and-play operation with major switches and routers. Optimized firmware settings prevent port errors and ensure stable link recognition upon installation.
Rigorous Testing Ensures Reliable SFP Performance
Every LS-CW551G-20C CWDM 1G SFP optical transceiver undergoes comprehensive factory testing to verify optical stability and signal integrity before deployment. Discover our complete validation process and quality standards at the LINK-PP Test Support Center.
Optical Spectrum Test
Inspect spectral width and center wavelength for precise channels.
Eye Pattern Test
Analyze waveform clarity to confirm low optical signal distortion.
Bit Error Rate Test
Check data packet transmission accuracy across full link spans.
Temperature Test
Assess module operational durability within standard thermal limits.
Product Shipping for Juniper LS-CW551G-20C Compatible LINK-PP 1.25G SFP
We utilize secure packaging and dependable transit networks to protect LS-CW551G-20C SFP transceiver modules during domestic and international transit. Efficient fulfillment workflows ensure prompt dispatch so your network hardware arrives safely and on time.
Anti-Static Protective Packaging
Prevent electrostatic discharge damage using specialized ESD protective packaging.
Shock-Resistant Transport Protection
Absorb physical impact forces to safeguard sensitive optical component alignments.
Fast Order Processing and Dispatch
Accelerate order fulfillment timelines for rapid shipment from warehouse facilities.
Global Logistics and International Delivery
Partner with reliable express carriers for trackable worldwide destination shipping.
Insert the Juniper LS-CW551G-20C Compatible LINK-PP module into an SFP slot, connect duplex LC single-mode fiber, and establish a 1550nm CWDM link. Designed for network aggregation layers, this hot-pluggable module enables efficient traffic consolidation, seamless switch interconnectivity, and long-reach data routing across campus backbones without network disruption.
LS-CW551G-20C Technical Support
LINK-PP offers end-to-end technical support, from pre-sales consultation to post-deployment assistance, ensuring smooth integration and reliable network performance.
Pre-Sales Technical Consultation
Professional guidance to help you select the optimal LS-CW551G-20C module for your network design and application needs.
Compatibility Verification Support
Validated compatibility with LINK-PP switches and other mainstream networking platforms for seamless deployment.
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.
A:
The module features an all-metal enclosed housing engineered to meet international EMC (Electromagnetic Compatibility) standards. This robust shielding suppresses external EMI and minimizes internal radiation, preventing bit errors even in high-density, mixed-media switch chassis. By
admin on
2026-04-26
A:
Yes, digital optical monitoring (DOM) via the internal I²C bus provides real-time internal temperature telemetry alongside TX/RX optical power and laser bias current. While the commercial operating range is 0 to 70°C, sustained temperatures above this threshold may degrade laser efficiency and shift the DFB center wavelength outside the filter passband, so adequate chassis airflow is recommended. By
admin on
2026-01-13
A:
The module provides an optical link budget of 19 dB (minimum TX power of -5 dBm minus receiver sensitivity of -24 dBm). In a typical CWDM topology, passive MUX/DEMUX insertion loss accounts for ~2.5 to 3.5 dB per end (5–7 dB total), leaving approximately 12–14 dB of optical margin across standard G.652 single-mode fiber (attenuation ~0.22 dB/km at 1550nm), easily covering a 20km transmission run. By
admin on
2025-10-08
A:
Yes, for a direct point-to-point single-mode fiber run without a CWDM MUX in between, this 1550nm DFB transceiver can link with a standard broadband 1550nm SMF transceiver, because both operate within the 1550nm optical window. However, when routing through a CWDM MUX/DEMUX, both endpoints must match the specific 1550nm multiplexer channel filter. By
admin on
2025-07-19
A:
This LS-CW551G-20C module adheres strictly to ITU-T G.694.2 CWDM grid standards, operating on the standard 1550nm grid center with a typical spectral width and wavelength tolerance of ±6.5nm, making it fully compatible with standard 20nm channel-spaced passive CWDM filters. By
admin on
2025-03-15
Conducted full throughput and compatibility tests across multiple switch brands in our staging rack. The DFB transmitter provides a crisp optical eye pattern and EMC shielding prevents interference near high-density power distribution units. It easily sustained 1.25Gbps line-rate traffic during weekend soak testing.
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character.
491838
461382
E***s
Japan
Verified
Purchase
5 .0
2026-04-19
We integrated this 1G CWDM SFP transceiver into our point-to-point backup link. Link margin is generous with -24dBm receiver sensitivity, and the duplex LC latches securely even in tight high-density patch panels. Great product engineering and finish.
Please write comments with more than three
character.
491838
461393
R***r
Brunei Darussalam
Verified
Purchase
5 .0
2026-01-08
Installed this 1550nm SFP module on our campus core switch. Tx power is holding steady around -2 dBm, and DOM tracking works seamlessly across all management consoles.
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character.
491838
461388
C***l
Belgium
Verified
Purchase
5 .0
2025-09-21
Added these into our existing CWDM multiplexer setup. Wavelength precision at 1550nm is spot on, no crosstalk detected with adjacent 1530nm/1570nm channels.
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character.
491838
461387
B***n
Belgium
Verified
Purchase
4 .0
2025-08-31
Shipping ran a few days late and the outer box corner got dented, but the module itself swept clean and passed the full 20km test without a hiccup. Just logistics friction, so four stars.
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character.
491838
461380
E***k
Bangladesh
Verified
Purchase
5 .0
2025-07-09
We used this 1G CWDM 1550nm SFP transceiver to bridge our central datacenter to a remote warehouse over singlemode fiber. SFF-8472 digital diagnostics report -3.1 dBm TX power and -16.4 dBm RX power across 14km of installed plant fiber, giving us plenty of optical power margin. Very dependable optic for enterprise deployments.
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character.
491838
461384
E***n
Netherlands
Verified
Purchase
5 .0
2025-05-04
Deployed inside an indoor distribution cabinet with limited passive airflow. Modules remain comfortably within the 0 to 70°C operating temperature rating while maintaining consistent TX/RX thresholds under continuous data transfer. Essential piece for our CWDM infrastructure.
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character.
491838
461386
I***r
Singapore
Verified
Purchase
5 .0
2025-03-30
Upgraded our inter-building uplink with these CWDM transceivers. We were able to multiplex Gigabit traffic into our existing 1550nm filter grid without upgrading physical cabling. DOM integration provides real-time laser bias current and voltage directly to our monitoring system. Outstanding reliability and build quality.
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