Service providers are expanding the global reach of their Wi-Fi and wired Ethernet networks to offer users better remote access when traveling.

AT&T recently announced that it nearly quadrupled its wireless LAN (WLAN) locations and tripled its wired Ethernet locations in the past 12 months. Last year, Sprint added scores of hot spots to bring its total number of Wi-Fi locations up to 14,000. And MCI says it will more than double its Wi-Fi footprint by May.

"The numbers only mean something if the hot spots are in useful locations for users," says Lisa Pierce, a vice president at Forrester Research. If a service provider has 10,000 hot spots but most are in cafes and not in airports, that's not going to be as meaningful to an enterprise customer, she says.

Service providers are turning to Wi-Fi to offer users secure, remote access to corporate networks in more geographic locations than ever. AT&T has expanded the number of wireless-LAN, or Wi-Fi, hot spots available to customers to just more than 9,000, almost two-thirds of which are in the U.S. The carrier also now has 1,551 wired Ethernet locations.

"In February 2004, we had just above 3,000, combined," says Rick Gretsch, director of product management for global IP at AT&T. The carrier had about 2,500 Wi-Fi hot spots and 500 wired Ethernet locations, meaning it has added about 6,600 hot spots and about 1,050 wired Ethernet locations over the past year.

The majority of the new Wi-Fi locations come from AT&T's expanded relationship with GoRemote Internet Communications , Gretsch says. AT&T does not own or operate any of its hot spots. "That's a business we decided not to be in," he says.

While AT&T owns and operates a small number of wired Ethernet locations, the majority of the 1,551 broadband locations are supplied through third-party agreements.

Gretsch says AT&T will continue to grow the number of hot spots and wired Ethernet locations.

"We will focus a lot of our attention on travelers and places they go this year," Gretsch says. That includes hotels and airports. Today, AT&T offers Wi-Fi access in 70 airports,which include 17 of the 20 busiest, he says.

The carrier says it's primarily expanding in the larger cities around the world where business users most frequently travel.