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by Juniper
Product Line: Juniper Network Cables
Product Type: QDD-400G-DAC-2P5M - Direct Attach Copper Cable
Original price $0.00 - Original price $536.00
Original price
$0.00 - $536.00
Current price $536.00
Title: Surplus

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Product Description

The QDD-400G-DAC-2P5M is a QSFP56-DD 400GbE DAC cable that supports a maximum data rate of 400Gb/s with a modulation format of PAM4, enabling speeds up to 56Gbps. The cable has a length of 2.5m (8.2ft) and utilizes a QSFP-DD to QSFP-DD connector, with a wire gauge of AWG 28 and a PVC (OFNR) jacket material. It operates within a temperature range of 0°C to 70°C and has a minimum bend radius of 35mm.

Key Feature for the QDD-400G-DAC-2P5M

  • What is the maximum data rate supported by the QSFP56-DD 400GbE DAC 2.5 M?
    The maximum data rate supported is 400Gb/s.
  • What are the physical characteristics of the 2.5m (8ft) 400G QSFP-DD to QSFP-DD PAM4 cable?
    The cable features QSFP-DD to QSFP-DD connectors, uses AWG 28 wire gauges, is made from PVC (OFNR) jacket material, has a length of 2.5m (8.2ft), and a minimum bend radius of 35mm.
  • Can the QSFP56-DD 400GbE DAC cable operate in high-temperature environments?
    Yes, it can operate in environments with temperatures ranging from 0°C to 70°C.
  • What modulation format does the 2.5m (8ft) 400G QSFP-DD to QSFP-DD PAM4 cable use?
    It uses the PAM4 modulation format.
  • Is the QSFP56-DD 400GbE DAC 2.5 M suitable for short-distance connections?
    Yes, with a cable length of 2.5m, it is suitable for short-distance connections.
  • What materials are used in the construction of the QSFP56-DD 400GbE DAC 2.5 M?
    The cable uses PVC (OFNR) for the jacket material.
  • What is the minimum operating temperature for the 2.5m (8ft) 400G QSFP-DD to QSFP-DD PAM4 cable?
    The minimum operating temperature is 0°C.
  • How does the QSFP56-DD 400GbE DAC 2.5 M handle data transmission?
    It handles data transmission using speeds up to 56Gbps with PAM4 modulation.
  • What is the minimum bend radius for the QSFP56-DD 400GbE DAC 2.5 M?
    The minimum bend radius is 35mm.
  • Are both ends of the 2.5m (8ft) 400G QSFP-DD to QSFP-DD PAM4 cable the same?
    Yes, both ends have QSFP-DD connectors.

Product Review

The Juniper QDD-400G-DAC-2P5M offers a maximum data rate of 400Gb/s over a 2.5m length, providing high-speed connectivity for data center networking with QSFP-DD to QSFP-DD connectors. Its PVC (OFNR) jacket and 28 AWG wire gauge ensure durability and compliance with fire safety standards, making it suitable for dense network configurations. However, the operational temperature range (0°C to 70°C) might limit its use in environments with extreme temperature variations.


The Juniper QDD-400G-DAC-2P5M is a high-speed Direct Attach Cable (DAC) designed to connect networking hardware with QSFP-DD ports, facilitating data transmission speeds of up to 400Gb/s. This cable is an essential component for data centers, high-performance computing environments, and enterprise networking solutions that require fast and reliable interconnectivity. With a length of 2.5 meters (approximately 8.2 feet), it offers flexibility in connecting devices that are relatively close to each other while ensuring minimal signal loss. Built to support the latest in data transmission technology, the QDD-400G-DAC-2P5M utilizes PAM4 modulation, enabling speeds up to 56Gbps per channel. This advanced modulation format allows for the doubling of data rate transmission capabilities over the same bandwidth, making this cable an efficient choice for high-density networks. The cable's construction includes a QSFP-DD to QSFP-DD connector type, ensuring compatibility with the latest generation of networking equipment that supports 400GbE standards. Key hardware specifications of the Juniper QDD-400G-DAC-2P5M include: - Wire gauges are set at AWG 28, providing a balance between flexibility and performance. - The jacket material is PVC (OFNR), offering durability and resistance to fire, ensuring safety and longevity in various environments. - A minimum bend radius of 35mm, allowing for easy installation in tight spaces without compromising the integrity of the cable. Other notable features of this DAC include its operational temperature range, which spans from 0°C to 70°C. This wide temperature range ensures that the cable can perform reliably in a variety of climatic conditions, from relatively cold to hot environments, making it versatile for different geographic locations. In terms of data integrity and speed, the QDD-400G-DAC-2P5M stands out by offering a maximum data rate of 400Gb/s. This capability is critical for applications that demand high bandwidth, such as streaming high-definition video content, executing complex computational tasks, or transferring large data sets within a network. For network engineers and IT professionals looking to upgrade their infrastructure, the Juniper QDD-400G-DAC-2P5M offers a practical solution for achieving high-speed data transmission without the need for active components. This not only simplifies the network design but also reduces power consumption and operational costs. The cable's plug-and-play nature ensures ease of installation, making it a straightforward upgrade for enhancing network performance. In summary, the Juniper QDD-400G-DAC-2P5M is a high-performance, reliable cable designed to meet the demands of modern data centers and networking environments. Its advanced features and specifications make it an ideal choice for facilitating fast and efficient data communication across a range of applications.


Part Number / Manufacturer Juniper QDD-400G-DAC-2P5M
Description 400G QSFP-DD to QSFP-DD Direct Attach Cable, 2.5 meters
Connectors QSFP-DD to QSFP-DD
Cable Gauge 28 AWG
Outer Sheath Material PVC (Optical Fiber Non-conductive Riser)
Peak Data Throughput 400 Gbps
Length 2.5 meters (8.2 feet)
Least Radius for Bending 35 mm
Transmission Technology PAM4
Maximum Transmission Speed 56 Gbps (PAM4)
Operating Temperature Range - Low 0°C
Operating Temperature Range - High 70°C

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