VIAVI TestCenter SPT-N4U Compact Chassis

The VIAVI TestCenter SPT-N4U is a compact 4RU, two-slot modular chassis for scalable 10G through 400G Ethernet testing, supporting up to 2.4 Tbps of test traffic and 96 Ethernet test ports.

  • Compact, 19-inch rack-compatible 4RU chassis with two test-module slots
  • Scales to 2.4 terabits of test traffic per second
  • Supports up to 96 × 10G/25G, 48 × 50G, 24 × 40G/100G, 8 × 200G, or 4 × 400G Ethernet ports
  • Supports up to 32 simultaneous users with IPv4- and IPv6-compatible administration
  • Provides precision timing, native IEEE 1588v2 PTP support, automatic chassis synchronization, and touchscreen administration
*Compatibility note: The FX3-QSFP28-6 test module is not supported in this chassis



 

The VIAVI TestCenter SPT-N4U Compact Chassis provides high-density, modular Ethernet testing in a smaller form factor. Its two test-module slots support flexible configurations for validating routers, switches, data-center fabrics, and other high-performance network infrastructure.

Designed for laboratories where equipment may need to be relocated, the N4U combines scalable traffic generation with a compact 4RU design. It supports multiuser functional testing and can be connected with additional chassis when greater test density is required.

Precision timing and synchronization capabilities support dependable latency and jitter measurements across large-scale and multisite testing environments. Native IEEE 1588v2 Precision Time Protocol support and automatic chassis-to-chassis calibration help maintain accurate timing across synchronized systems.

The N4U also simplifies laboratory administration with intelligent power and fan control, faster startup and firmware upgrades, a built-in touchscreen for real-time system status, and browser-based TestCenter client downloads. Existing TestCenter interfaces and APIs remain consistent across the platform.

Product Details

Manufacturer: VIAVI Solutions
Product family: VIAVI TestCenter
Model: SPT-N4U Compact Chassis
Form factor: 4RU, 19-inch rack-compatible chassis
Test-module capacity: Two module slots
Maximum traffic capacity: 2.4 Tbps
Maximum port capacity: 96 × 10G/25G, 48 × 50G, 24 × 40G/100G, 8 × 200G, or 4 × 400G Ethernet ports
Simultaneous users: Up to 32 per chassis
Administration: IPv4/IPv6 compatible with built-in touchscreen, Ethernet administration, SSH access, and external display and USB connectivity
Timing and synchronization: IEEE 1588v2 PTP, GPS, CDMA, TIA/EIA-95B, and NTP support through an external timing receiver
Chassis synchronization: Direct chassis clustering with automatic synchronization-cable calibration
Airflow: Side-to-side, left to right
Dimensions: 17.5 × 7 × 27 inches (44.45 × 17.8 × 68.6 centimeters)
Weight: 58.6 pounds without test modules; approximately 81.6 pounds fully loaded
Maximum power requirement: 2 kW when fully loaded
Operating temperature: 59°F to 95°F (15°C to 35°C)
Operating humidity: 20% to 80% relative humidity
Available models: SPT-N4U-110 and SPT-N4U-220
Compatibility note: The FX3-QSFP28-6 test module is not supported in this chassis

More Product Information

VIAVI Communications/RF

VIAVI is a leading worldwide provider of highly specialized test and measurement equipment and microelectronic solutions. 

VIAVI Solutions is proud of our industry-leading network solutions for Telecommunications Service Providers, Equipment Manufacturers, Enterprises, and Entities in fields of Government and Avionics. VIAVI is consistently #1 or #2 in the markets we serve, including: Fiber, Cable, Access, Metro and Transport, RAN-to-Core, LandMobile and Military Radio and Nav/Comm and Transponder. We offer end-to-end network visibility and analytics that help build, test, certify, maintain, and optimize complex physical and virtual networks. 

Our optical specialty products division is renown for expertise in anticounterfeiting pigment materials, 3D Sensing, and optical filters – holding #1 positions in those markets as well. 

The pioneering spirit at VIAVI continues as we light the path to 5G with innovative test and measurement products, and lead the way with 3D sensing technology.

📡 Communications / RF

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Front view of the VIAVI TestCenter SPT-N4U compact chassis
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