For others, the wireless service represents a less expensive and less time-consuming option to installing fiber-optic lines in existing buildings. Fiber-optic lines are glass or plastic and have a high capacity for transmitting information as light pulses.

About 20 percent of business buildings around the country are served by fiber-optic lines, said Peter Kasparoff, general manager of the Las Vegas market for XO Communications.

The wireless service costs about 30 percent to 40 percent less than fiber optics, which may take several months to install, Kasparoff said. The telecommunications quality over the wireless service is virtually the same as XO's fiber-optic service, he said.

The typical customer would be a business that spends $1,200 to $2,000 on telephone and telecommunications monthly, he said.

XO already faces a couple of wireless competitors in Las Vegas. Andrew Kreig, chief executive officer of the Wireless Communications Association International, expects that more will enter the Las Vegas market, although with somewhat different products, such as mobile Wi-Max.

"There is about to become a wave of wireless services, and this is a sign of new competition in the wireless sector," Kreig said.

XO is operating wireless services in 12 metropolitan areas around the country with the addition of Las Vegas. It has licenses for the spectrum in 75 cities.

The company has its area operations headquartered in Henderson and employs 40 people in the valley.