QNAP QSFP28 100GbE Break Out Four SPF28 25GbE Twinaxial Direct Attach Cable (4.9')

Overview

The QNAP CAB-DAC15M-Q28B4 is a direct attach cable that connects a single 100GbE QSFP28 port to four separate 25GbE SFP28 ports. Measuring 4.9 feet (1.5 meters) in length, it is designed to support high-speed data transfer within short distances, making it ideal for linking devices inside racks or between adjacent racks. This cable is well suited for data centers and enterprise networks that require multiple 25GbE connections from one 100GbE interface, providing a practical and efficient solution for expanding network capacity.

Its twinaxial construction ensures reliable signal integrity and durability, which is essential for maintaining stable performance in demanding environments. The cable works seamlessly with compatible NAS enclosures, storage arrays, and network switches, offering a cost-effective alternative to using additional transceivers.

Key features

• Breaks out one 100GbE QSFP28 port into four 25GbE SFP28 connections, enabling flexible network expansion
• Twinaxial direct attach design delivers consistent signal quality over short distances without external transceivers
• 1.5-meter length fits well for connections within or between adjacent racks, simplifying cable management
• Durable build optimized for high-demand network environments, ensuring long-lasting reliability
• Compatible with a range of QNAP and other supported NAS, storage, and switch hardware for smooth integration

Key specs

• Connector type: QSFP28 to four SFP28 ports
• Data rate: 100GbE breakout to 4 x 25GbE
• Cable length: 1.5 meters (4.9 feet)
• Cable type: Twinaxial direct attach
• Designed for short-distance, high-speed connections

Connectivity and compatibility

This cable is designed to connect a 100GbE QSFP28 port to four 25GbE SFP28 ports, making it suitable for network switches, NAS enclosures, and storage arrays that support these interfaces. It enables efficient use of a single high-speed port to serve multiple lower-speed connections, which is valuable in environments where port density and bandwidth management are critical.

• Supports QSFP28 and SFP28 standards for broad hardware compatibility
• Ideal for use in data centers and enterprise networks requiring breakout connections
• Works with QNAP devices and other compatible equipment supporting 25GbE and 100GbE interfaces

Ideal uses and environments

This breakout cable is a strong choice for IT professionals and network administrators managing high-throughput environments that demand low latency and reliable connections. It fits well in data centers, server rooms, and enterprise networks where consolidating multiple 25GbE links from a single 100GbE port helps optimize infrastructure and reduce costs. Its short length and durable design make it practical for rack-level connections and adjacent rack setups.