Finisar FTL4C1QL1L 40Gbps QSFP+ optical transceiver
Product Overview
The Finisar FTL4C1QL1L is a 40Gbps QSFP+ optical transceiver designed for medium-reach, extended-temperature data center and enterprise applications. Operating under the 40GBASE-LR4 Lite (L Temp) standard, it uses four 1310nm LAN-WDM channels to deliver reliable transmission up to 2 kilometers over single-mode fiber (SMF). This hot-pluggable module is optimized for high-density 40G Ethernet deployments in environments with a wider temperature range.
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Key Specifications
| Parameter | Details |
|---|---|
| Part Number | FTL4C1QL1L |
| Data Rate | 40 Gbps (40GBASE-LR4 Lite, 4x10G lanes) |
| Wavelength | 1310 nm LAN-WDM (four parallel channels) |
| Transmission Distance | Up to 2 km over single-mode fiber (SMF, 9/125 μm) |
| Fiber Type | Single-mode fiber (SMF) |
| Connector | MPO/MTP-12 (parallel optics) |
| Form Factor | QSFP+ (SFF-8436 compliant) |
| Power Supply | 3.3V DC |
| Operating Temperature | Extended commercial grade (0°C to +85°C, "L Temp") |
| Laser Class | Class 1 |
| Manufacturing Location | Made in Malaysia |
| Compliance | IEEE 802.3ba-2010 (40GBASE-LR4 Lite), SFF-8436, RoHS |
Key Features
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40Gbps High-Density Performance
Delivers 40Gbps throughput using four parallel 10G lanes, enabling high-bandwidth connections for data center spine/leaf switches and core routers.
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LR4 Lite & Extended Temperature Design
Optimized for 2km SMF transmission at 1310nm, with an extended temperature range (0°C to +85°C) making it suitable for warmer data centers or outdoor telecom deployments.
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Hot-Pluggable QSFP+ Form Factor
Fully hot-swappable for tool-free installation and replacement, minimizing network downtime during maintenance or upgrades.
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Digital Optical Monitoring (DOM)
Provides real-time monitoring of optical power, temperature, voltage, and laser bias current for each channel, enabling proactive network management and troubleshooting.
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Low Power Consumption
Energy-efficient design supports high-density deployments in data centers, reducing cooling and operational costs.
Applications
- Data Center Interconnects (DCI): 40G links between data center buildings or campus facilities up to 2km apart, especially in high-temperature environments.
- High-Density Switch Uplinks: 40G uplinks for core and aggregation switches in enterprise and cloud data centers.
- Campus Backbone Networks: Connecting geographically dispersed campus buildings over single-mode fiber.
- Cloud Service Provider Networks: High-bandwidth 40G connections for cloud computing and storage infrastructure.
Our Services
Faster delivery | Worldwide shipping | Alternative supply | Sample service | Test and warranty | In-Stock (Most products) | Quality Assured | Customization | Competitive Pricing | Cost-effective modules
For optical transceivers, we offer new original, high-quality compatible, and economical refurbished options to fit different project budgets. All modules go through the same strict testing process to ensure stable performance, plug-and-play compatibility, and reliable long-term operation.
Full range of options:
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New original: 100% genuine, brand new, with full manufacturer quality assurance.
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Compatible modules: Cost-effective, fully tested, compatible with Cisco, Huawei, Ericsson, Nokia, Juniper, HP, H3C, Arista, Dell and other major brands.
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Refurbished / second-hand: Economical, functionally tested, durable for daily use.
Strict quality control: Each optical transceiver is professionally tested before shipment, including optical power, compatibility (with Cisco, Huawei, Ericsson, Nokia, etc.), DDM function, and long-duration stability testing.
Worry-free after-sales: Warranty provided; any quality-related issues under normal use are covered for return or replacement.
About Us
Skyward Telecom, also known as Skywardtel, was established in 2009. We have always adhered to the principle ofintegrity first, with a mission to help engineers, integrators, and enterprises obtain high-quality, cost-effective communication products.
Specializing in optical transceivers, telecom modules, base station equipment, and connectivity solutions, we focus on providing multi-brand compatible optical modules (Cisco, Huawei, Ericsson, Nokia, Juniper, HP, etc.) and have served clients in more than 80 countries worldwide, earning consistent market recognition for reliability, price competitiveness, and professional technical support.
FAQ
- Who are we?
We are based in Guangdong, China, founded in 2009. Our products are sold to Northern Europe, Western Europe, Eastern Europe, North America, South America, Middle East, Africa, Asia, Oceania, and other global markets. We focus on optical transceivers, telecom modules, base station equipment, and communication accessories, with a professional team of 80-100 people.
- How can we guarantee quality?
All optical transceivers undergo professional optical performance testing before shipment. - Compatibility verification on major brand equipment (Cisco, Huawei, Ericsson, Nokia, Juniper, HP, H3C, Arista). - 100% inspection for each module to ensure stable, error-free operation. - Strict quality control for new, compatible, and refurbished products.
- What can you buy from us?
1G / 1.25G / 2.5G / 10G / 25G / 40G / 100G optical transceivers (SFP, SFP+, SFP28, QSFP+, QSFP28) - New original, compatible (Cisco/Huawei/Ericsson/Nokia compatible), and refurbished optical modules - Multi-brand compatible transceivers for base stations, switches, and data centers - Telecom accessories, fiber cables, connectors, and base station components
- Why should you buy from us not from other suppliers?
Professional focus on optical transceivers and telecom equipment, with years of industry experience. - Multiple supply options: original, compatible (for major brands), refurbished. - Strict testing for every module, ensuring compatibility with Cisco, Huawei, Ericsson, Nokia, etc. - Competitive wholesale pricing and stable stock. - Global delivery, fast shipping, and professional technical support. - Integrity-based operation, trusted by customers worldwide.
- What services can we provide?
Accepted Delivery Terms: FOB, CFR, CIF, EXW, FCA, DDP Accepted Payment Currency: USD, EUR, GBP, HKD, CNY Accepted Payment Type: T/T, Credit Card, PayPal, MoneyGram Language Support: English, Chinese, Spanish, Arabic, French, Portuguese, German, Russian, Japanese, Korean, Hindi, Italian Welcome to contact us for the best bulk price and latest stock availability.