Fore Systems said its second-quarter net profits fell by more than half while its revenues increased slightly. The networking firm reported profits of nearly $7 million for the quarter, compared with $13.4 million a year ago. Revenues rose to $109.7 million, up from $98 million a year earlier. The company has been battling disappointing quarters and perceptions that it has maxed out its ATM strengths, pointing to an increase in ATM sales over the previous quarter.