100G QSFP28 DAC Cable

 

Item Spotlights

● QSFP28 conforms to the Small Form Factor SFF8665

● 4-Channel Full-Duplex Passive Copper

● Cable Transceiver

● Support data rates : 25.78Gb/s (per channel)

● Maximum aggregate data rate: 100Gb/s (4 x 25.78Gb/s)

● IEEE 802.3bj 100GEBASE-CR4

● Power Supply :+3.3V

● Low crosstalk

● I2C based two-wire serial interface for

● EEPROM signature which can be customized

● Operating Temperature: 0~70 °C

● ROHS Compliant

 

Description

Compatible	100G QSFP28 DAC	Vendor Name	FB-LINK
Connector Type	QSFP28 to QSFP28	Max Data Rate	100Gbps
Minimum Bend Radius	33mm	Wire AWG	30AWG
Cable Length	1~7m	Jacket Material	PVC(OFNR)
Media	Copper	Cable Type	Active Twinax
Power Consumption	≤1.5W	Temperature	0 to 70°C (32 to 158°F)
Protocols	QSFP28 MSA, SFF-8665	Warranty	3 Years

 

In the bustling core of data centers, where speed and reliability define operational success, the demand for high-performance connectivity has never been greater. As businesses scale their cloud operations, analytics workloads, and AI initiatives, the need for seamless 100Gbps links between switches, routers, and servers has become non-negotiable. While optical transceivers have long been the backbone of long-distance data transmission, short-range connections require a solution that balances speed, cost, and efficiency-enter FB-LINK's 100G QSFP28 Passive DAC Twinax Cable, a complementary powerhouse to traditional optical transceivers for rack-level and adjacent-rack connectivity.

Optical transceivers excel in bridging distances from tens of meters to hundreds of kilometers, using light signals to transmit data across fiber optic cables. They are indispensable for metro and wide-area networks, where signal integrity over long spans is critical. However, in the dense environment of a data center, where devices sit mere meters apart, relying solely on optical transceivers can introduce unnecessary costs and complexity. This is where FB-LINK's 100G QSFP28 DAC shines: it delivers the same 100Gbps performance as optical transceivers but is optimized for short-range deployments, offering a streamlined alternative without compromising on quality.

What sets this DAC cable apart is its design that aligns with the rigorous standards that define top-tier optical transceivers. Compliant with industry benchmarks, it ensures seamless interoperability with QSFP28 ports on a wide range of networking equipment-from switches to servers-just as optical transceivers do across their supported ecosystems. Each connector integrates intelligent features that mirror the diagnostic capabilities of advanced optical transceivers, allowing host systems to access product information for easy inventory management and troubleshooting. This level of compatibility and intelligence makes it a reliable companion to optical transceivers in hybrid network setups.

Beyond compatibility, the cable addresses key pain points in data center operations that optical transceivers alone can't solve for short distances. Its robust construction minimizes signal interference, a common challenge in high-density environments where multiple cables run in close proximity. This ensures consistent performance even amid the electromagnetic activity of surrounding servers and switches-something that even premium optical transceivers can struggle with when deployed in suboptimal short-range scenarios. Additionally, its flexible design simplifies routing through tight spaces, reducing installation time and improving cable management compared to the more delicate handling required for fiber optic cables used with optical transceivers.

Cost efficiency is another area where the DAC cable complements optical transceivers. While optical transceivers are worth the investment for long-haul links, their components-like lasers and photodetectors-add unnecessary expense for short distances. The FB-LINK DAC eliminates these costs while maintaining 100Gbps speeds, making it a budget-friendly choice for data center operators looking to optimize spending without sacrificing performance. When paired with optical transceivers for longer links, it creates a comprehensive connectivity strategy that balances performance and cost across the entire network.

Frequently Asked Questions (FAQs)

How does this 100G QSFP28 DAC differ from optical transceivers?Optical transceivers use light to transmit data over fiber optic cables, making them ideal for long distances (tens of meters to kilometers). This DAC cable uses copper to transmit electrical signals, optimized for short distances (rack-level and adjacent racks). While both deliver 100Gbps speeds, the DAC is more cost-effective and energy-efficient for short-range deployments, while optical transceivers are necessary for longer spans.

Can this DAC cable work alongside optical transceivers in my network?Yes, they are designed to complement each other. You can use the DAC cable for short connections between switches and servers within or between adjacent racks, and optical transceivers for longer links between different data center zones or across geographic locations. Both comply with industry standards, ensuring seamless integration into the same network infrastructure.

Why would I choose this DAC over using optical transceivers for short-range links?For short distances, the DAC offers significant advantages: lower upfront cost (no expensive laser components), reduced power consumption, and simpler installation. Optical transceivers introduce unnecessary complexity and expense for links where copper can deliver the same speed and reliability. The DAC also requires less maintenance than fiber optic setups used with optical transceivers.

Does this DAC cable offer the same reliability as optical transceivers?For its intended short-range use case, it matches the reliability of optical transceivers. It undergoes rigorous testing to ensure low signal loss and interference, and its compliance with industry standards guarantees consistent performance. Optical transceivers still have the edge for long distances, but for rack-level connectivity, the DAC is equally dependable.

Will this DAC cable be compatible with my existing optical transceivers' ecosystem?Absolutely. It adheres to the same QSFP28 MSA and SFF-8665 standards that govern many optical transceivers, ensuring it works seamlessly with QSFP28 ports on switches, routers, and servers that also support compatible optical transceivers. The integrated EEPROM further enhances compatibility by allowing host systems to recognize the cable, just as they do with optical transceivers.

In a landscape where network efficiency depends on matching the right technology to the right use case, FB-LINK's 100G QSFP28 Passive DAC Twinax Cable emerges as a vital complement to optical transceivers. It delivers the speed and reliability data centers demand for short-range links, while optical transceivers handle the long-haul heavy lifting-together creating a network that is both high-performing and cost-effective. Whether you're upgrading an existing infrastructure or building a new data center, this DAC cable ensures your short-range connections are just as robust as the optical transceiver-powered links that extend beyond the rack.

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