Keysight Technologies N5541A Test System Chassis is a four-slot N2X mainframe designed to host up to four N2X test cards for converged network service testing. This portable chassis can be mounted in a standard 19‑inch rack, and its catalog designation is the 971-0101 N5541A 4-Slot Chassis in Keysight/Agilent nomenclature. In the described configuration it encompasses four N5551A 4-port SFP modules, enabling simultaneous testing of four SFP-based links. The N2X family assembles routing, switching, transport, and storage test capabilities within a single chassis, providing a modular platform for validating multi‑service networks with multiple test cards in parallel.
