Comba Telecom Systems Holdings plans to ramp up production capacity as mainland mobile-phone carriers resume infrastructure spending that was delayed in the second quarter due to Sars. Comba, which provides mobile-phone equipment such as repeaters that help wireless service providers eliminate blind spots in their coverage, said orders were strong in recent months. 'Our original plan was to increase our production capacity by 50 per cent this year, but now we're going to increase [our capacity] by 100 per cent,' Comba chairman and managing director Fok Tung-ling said. Mr Fok said equipment suppliers such as Comba would benefit in the second half as carriers put to work under-utilised capital expenditure budgets. By the end of the first half, Comba's only two clients - China Mobile and China Telecom - had spent just 29 per cent and 40 per cent of their full-year budgets earmarked for equipment purchases. Comba, which yesterday reported 38.7 per cent growth in interim revenue to $334.17 million, said second-half sales could be double the first-half result. It said first-half net profit increased 32.2 per cent year on year to $86.77 million, achieving 44.4 per cent of its full-year target of $195 million. But net margin fell 2.1 percentage points to 26 per cent due to pricing pressure and costs. Comba shares fell 20 cents yesterday to close at $3.20.