Picking Up On Caller Id

You'd expect Robert L. Diamond and Paul G. Locklin to be exultant. In three years, they've taken Cidco Inc. from a blip on the radar screen to the No.1 maker of caller-ID gear. But don't expect swagger. Says Diamond: "We stay awake at night. We worry about every pin that drops. And we worry about every competitor. We cannot rest."

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