11.   Other carriers will also use franchising to expand their presence, particularly in suburban or rural markets, Lowenstein said.

12.   She noted that different carriers use different aircraft, which have more or less space in the cabin.

13.   Such companies may include the Ciena Corp. and Tellabs, which make products that allow carriers to use bandwidth more efficiently instead of spending more to expand bandwidth capacity.

14.   That is why the carrier uses many secondary airports, where departure gates are more readily available and operating costs are lower than at bigger airports.

15.   The company, based in Woburn, Massachusetts, provides equipment and technology that carriers use for prepaid calling cards and service to consumers.

16.   The start-up carrier uses Oakland instead of San Francisco and flies to Ontario, Calif., instead of Los Angeles International Airport.

17.   The Woburn, Massachusetts-based company provides equipment and technology that carriers use to provide pre-paid calling cards and service to consumers.

18.   These carriers are using advanced fiber optics to carry voice, video and data together over high-speed networks, slashing operating costs.

19.   They have charged that the larger, more financially healthy carriers are using the current crisis to try to reduce competition.

20.   These are the methods international carriers use to determine payments for calls between countries.