Device Test Engineer/Network Test Engineer (Callbox / Wireless Lab)

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 NR Standalone (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 Validation

Execute 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 (VoWiFi), 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.