US Senate leader Jay Rockefeller has accused Motorola of undermining the First Responder Network Authority (FirstNet), a US radio network being developed to avoid repeating communications errors that affected emergency workers like the 11 September 2001 attacks.
Rockefeller alleged that the firm is funding public relations and lobbying a campaign to wean away support for mission and work on FirstNet.
The new network is targeted to replace the existing blend of municipal emergency radio systems.
Motorola has also appealed to work constructively with FirstNet to add more competition to public safety communications.
Rockefeller said in a letter to Motorola Solutions that that company's actions to oppose this important effort to strengthen the Nation's public safety communications systems directly contradicts the intent of Congress.
"I will not abide a return to the model of costly, and often proprietary, equipment that our nation's first responders face in narrowband communications," Rockefeller said.
"This model has led to disparate systems even among public safety agencies in the same jurisdiction.
"And I will not stand by while your company continues to defend a business plan solely because you are unwilling to make the investments and commitments necessary to be a true competitor on the new level playing field for public safety communications equipment."
Aimed at creating a single network using standards open to multiple device vendors, FirstNet is being built with an investment of $18bn to $40bn.
Motorola's system is intended to address the faults which left police and firefighters unable to communicate with each other during the Sept. 11, 2001 attacks.