The VIAVI Solutions 4126 MA3FCO is a T-BERD 2000 series network tester identified by model 4126 MA3FCO, part of VIAVI’s JDSU-era T-BERD 2000 test equipment lineup. Described as a tester within the T-BERD 2000 platform, it serves as a network test instrument designed for evaluating network performance and diagnostics.
