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QSFP-40G-ER4

The Cisco QSFP-40G-ER4 is a high-performance, hot-swappable 40GbE transceiver designed for long-range data center and enterprise networking, supporting distances up to 40km over single-mode fiber—ideal for extending network reach with reliable used hardware.

SKU: QSFP-40G-ER4 Brand: Product ID: 127088
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Description

The Cisco QSFP-40G-ER4 is a high-performance, long-range transceiver module designed for 40 Gigabit Ethernet applications. Built to support single-mode fiber (SMF) connections, it operates over distances of up to 40 kilometers using four separate 10Gbps channels multiplexed into a single fiber pair. The module utilizes LC duplex connectors and complies with the QSFP+ form factor, ensuring compatibility with a wide range of Cisco networking equipment. With low power consumption and high reliability, it is an excellent choice for extending network reach while maintaining efficiency.

This transceiver supports a wavelength of 1270 nm to 1330 nm, using coarse wavelength-division multiplexing (CWDM) technology to optimize data transmission. It is hot-swappable, making installation and replacement simple without disrupting network operations. Built-in digital diagnostics monitoring (DDM) provides real-time access to critical parameters such as temperature, voltage, and optical power levels. Designed for data centers, enterprise networks, and service provider environments, this module delivers robust performance for high-speed networking demands.

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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