The Federal Communications Commission said on July 31 that the device did not reliably detect unoccupied spectrum and could interfere with other TV programming and wireless microphone signals.
On Monday, Microsoft sent the agency a letter explaining that a subsequent test determined the equipment was defective.
Representatives for Microsoft and other technology companies met with FCC engineers last week and determined the device “was working improperly and an internal component was broken,” Microsoft’s managing director for government affairs, Jack Krumholtz, said in a statement on Monday.
“This accounted for the FCC’s aberrant test results,” Krumholtz said.
An FCC spokesman declined to comment on the matter.
See earlier Not Ready for Prime Time