FOR REPAIR Spirent SPT-N4U-220 2-Slot Chassis Base Model FW REQUIRED

Condition: For parts or not working

This Spirent SPT-N4U 2-slot chassis (Serial Number: E17060250, Controller Revision: E14) was confirmed fully operational prior to a firmware update attempt. During the firmware change, the system failed and is now stuck on the connecting screen. It is no longer possible to log in to the interface. Any previously active licences are likely lost. This unit is sold strictly for parts or repair — buyers must be confident they can recover the firmware before purchasing. NO RETURNS.

Chassis details recorded when the unit was last operational:
• Chassis Model: SPT-N4U
• Firmware Version: 4.71.0296
• Expected Firmware Version: 2.20.0000
• Controller Revision: E14 / Controller Version: 3
• Backplane Version: 2
• Serial Number: E17060250
• Slot Count: 2
• Sync Status: Synchronized (Internal)
• TSN Licence: Active
• L1 Licence: Active
• KP4 Licence: Not present
• 5G / 2.5G MGIG Licences: Not present

Previously active licences (status at time of last operation):
• RFC-2544 with VLAN network device benchmark test pack
• Spirent SW update entitlement
• Packet generator and analyzer base package

The images provided are of the actual item you will receive. Please review them carefully for the cosmetic condition and what is included in the sale.

The Spirent SPT-N4U is a compact 2-slot modular chassis from Spirent Communications, designed as a platform for deploying Spirent test modules in network performance validation environments. It forms part of the Spirent TestCenter hardware ecosystem, which is widely used by network equipment manufacturers, telecommunications carriers, and test laboratories.

The SPT-N4U chassis provides the physical backplane, power, management, and synchronisation infrastructure required to host compatible Spirent test cards. Its compact form factor makes it suitable for lab bench use or rack integration where a smaller chassis footprint is preferred over larger multi-slot configurations.

When fully operational, the platform supports a wide range of network test applications including RFC 2544 benchmarking, packet generation and analysis, Layer 1 testing, and Time-Sensitive Networking (TSN) validation, depending on the installed licences and test modules.

Chassis Platform: Spirent TestCenter
Model: SPT-N4U
Slot Count: 2
Form Factor: Modular chassis
Management Interface: Ethernet (TCP)
Default TCP Port: 40004
Sync Capability: Internal and external synchronisation
Compatible Licences: RFC-2544, TSN, L1, packet generator/analyser, and others
Typical Applications: Network benchmarking, packet analysis, RFC 2544/Y.1564 compliance testing, TSN validation

Please refer to the Spirent Communications website for full current specifications and compatible module information.