Cellular device Testing; Callbox/Wireless Lab
Listed on 2026-10-12
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Engineering
Wireless / 5G, Systems Engineer
Network Test Engineer (Callbox / Wireless Lab) San Jose,CA Callbox Operation & Test Bed Bring-Up
anritsu , keysight or amarisfot callboxes . and with LTE /5G related testing experience.
Configure, calibrate, and operate industry-standard cellular callboxes (e.g., Anritsu MT8821C / MT8000A, Amarisoft Callbox Classic / Ultimate, Keysight) for RF simulation
and device verification.
Set up 4G LTE, 5G (SA), and Non-Standalone (NSA) simulated network cells with varying carrier bandwidths, MIMO configurations, and frequency bands.
Maintain lab RF cabling, attenuator matrices, splitters, and RF shielding enclosures to ensure interference-free test execution.
Test Execution & Network ValidationExecute comprehensive test suites for cellular device bring-up, carrier feature acceptance, and multi-SIM behavior.
Validate core features including:
Dual SIM Dual Standby (DSDS) and seamless data switching.
IMS Services:
VoLTE, VoNR, Wi-Fi Calling (Vo Wi Fi ), and SMS/MMS over IP.
Network attach/detach, inter-RAT handovers, cell reselection, and mobility transitions.
5G Standalone (SA) registration, PDU session establishment, and network slicing behaviors.
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