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QDD-400G-LR4-S

The Cisco QDD-400G-LR4-S is a high-performance 400G QSFP-DD transceiver designed for long-range data center and enterprise networking, offering reliable 10km optical transmission over single-mode fiber—ideal for cost-effective scalability in used network hardware deployments.

SKU: QDD-400G-LR4-S Brand: Product ID: 309824
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Description

The Cisco QDD-400G-LR4-S is a high-performance 400G QSFP-DD transceiver module designed for long-range data center and enterprise networking applications. Engineered for single-mode fiber (SMF), it supports a transmission distance of up to 10 kilometers using duplex LC connectors. This module operates over four CWDM wavelengths in the 1310 nm range, delivering reliable and efficient connectivity at data rates of 400 Gbps. Its hot-swappable design allows for easy integration into compatible Cisco switches and routers without requiring network downtime.

Built with advanced optical components and digital diagnostics monitoring (DDM), the QDD-400G-LR4-S ensures consistent performance and simplified troubleshooting. It supports IEEE 802.3bs 400GBASE-LR4 standards and is compliant with QSFP-DD MSA specifications, making it suitable for high-bandwidth aggregation layers and core network infrastructure. The module features a low power consumption profile, enhancing energy efficiency in dense deployments. When purchasing used, buyers should verify that the module has been tested for full functionality and is free from physical damage to ensure optimal performance.

Who We Are
 
ROC Telecom is a family-owned, Texas-based company specializing in helping businesses unlock value from their networking and telecom equipment. From routers and switches to optical gear and more, we provide a seamless solution for businesses looking to sell, recover assets responsibly, or buy quality-tested equipment at competitive prices.
 
What We Do
 
We make it easy to:
  • Sell Used Equipment: Get a quick, hassle-free quote and maximize the value of your old IT gear.
  • Buy Certified Networking Equipment: Access affordable, quality-tested equipment from top brands like Cisco, Juniper, Ciena, Fujitsu, Infinera and more.
Why Choose ROC Telecom?
  • Expertise You Can Trust: 15 years of experience in asset recovery and resale.
  • Sustainable IT Solutions: Reduce waste and support environmentally responsible practices.
  • Competitive Pricing: Fair, fast, and accurate valuations for all your equipment.
  • Free Shipping Logistics: Fast, secure, and hassle-free shipping or pickup options for buyers and sellers.
Our Process
  1. Submit a Request: You can use the “Buy” or “Sell” buttons above to get started — or fill out a form, call us at 585-406-1248, or email bailey@roctelecom.com. Whatever’s easiest for you, we’ll make it quick and hassle-free.
  2. Quick Evaluation: We’ll assess your equipment—whether you’re looking to sell it or find the right gear for your needs—and provide a fair offer.
  3. Simple Logistics: Fast, secure, and straightforward shipping or pickup solutions.
  4. Value Delivered: Recover funds from unused equipment or save on quality-tested networking and telecom gear.
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