"What we want longer term is certainty within the spectrum environment, and frankly, that's going to be relevant regardless of what happens to us in the short term," Carlisle said. Allowing GPS receivers to use spectrum licensed for another service, as LightSquared alleges they do, sets a dangerous precedent for future mobile development, he said.
Carlisle also denied that LightSquared's call to rein in GPS devices is intended to boost the value of its spectrum, which could come into play if the company wants to sell its assets in the future.
"The point is not to get some sort of windfall," Carlisle said. "The point is to have an environment where we feel certain that when we invest in six-year-old rules that there's actually some structure for protecting that investment as the FCC originally intended."
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