Spirent SPT-N4U Compact Chassis

The Spirent SPT-N4U compact chassis is the smallest modular chassis form factor that supports Spirent’s latest 10GbE, 40GbE and 100GbE test modules.


The SPT-N4U supports Spirent’s latest high-density test modules in a smaller chassis form-factor that incorporates innovative time- and money-saving capabilities such as: Built-in touchscreen administration, intelligent power and fan control, fast booting and system firmware upgrades.

With its efficient architecture, the SPT-N4U supports a variety of environments where the testing requires equipment to be relocated from time-to-time. It also supports multi-user functional testing and chassis chaining where higher density is required but a mainframe N12U is not available.

Features & Benefits

  • High-density in a small form-factor
    – Scales to 2.4 terabits of cloud traffic per second — 4 times the traffic capacity of the nearest competitor
    – Supports up to 24 40G ports, 96 10G ports, or 24 100G Ethernet ports per chassis
  • Investment protection for existing hardware and future technologies
    – Fully backward-compatible with existing Spirent HyperMetrics and HyperMetrics Next test modules*
    – Does not require learning new UIs or APIs
    – 400G Ethernet ready
  • Measurement reliability and accuracy
    – Best-in-class timing precision and synchronization (ten times better than the nearest competitor) for large scale tests and site-to-site latency/jitter measurements
    – Automatic calibration for chassis-to-chassis synchronization
    – Built-in external timing receiver (ETR) capability including native IEEE 1588v2 (PTP) support
  • Innovative design
    – Built-in touchscreen for real-time chassis status and administration
    – 4x times faster boot time and 3x times faster firmware upgrades than previous systems
    – Client software download from the chassis via Web browser

Additional information




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