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QSFP-40G-CSR4

The Cisco QSFP-40G-CSR4 is a high-performance, short-reach 40 Gigabit QSFP+ transceiver designed for cost-effective, high-density data center connectivity over multimode fiber, making it an ideal choice for reliable used network hardware deployments.

SKU: QSFP-40G-CSR4 Brand: Product ID: 127087

Description

The Cisco QSFP-40G-CSR4 is a high-performance, multimode fiber transceiver designed for reliable 40GbE connectivity in data centers and enterprise networks. Built in a compact QSFP+ form factor, it supports a maximum link length of up to 300 meters over OM3 fiber and 400 meters over OM4 fiber, making it ideal for high-speed, short-range connections. With MPO-12 connector compatibility, this module enables efficient parallel fiber transmission, reducing infrastructure complexity. Its hot-swappable design ensures seamless integration into existing Cisco networking equipment, minimizing downtime during upgrades or replacements.

Engineered for efficiency, the QSFP-40G-CSR4 operates on four independent 10Gbps channels, which are aggregated to deliver a total data rate of 40Gbps. It supports Digital Optical Monitoring (DOM) for real-time diagnostics, allowing network administrators to monitor critical parameters such as temperature, power levels, and signal integrity. Designed for low power consumption, it operates at just 3.5W, helping to optimize energy efficiency in high-density environments. This transceiver is a cost-effective solution for upgrading network infrastructure with used Cisco hardware, offering reliable performance at a fraction of the cost of new equipment.

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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