Wireless LAN Sites

From: "Jian-ming Jiang"
Subject: Re: [wirelesslan] wlan power limit

The Power Limits are as following:
Frequency Allocation FCC TPO(6 dBi antenna) ETSI
EIRP
(1) 5150 - 5250 MHz 50 mW 200 mW
(2) 5250 - 5350 MHz 250 mW 200 mW
(3) 5470 - 5725 MHz 250 mW (draft) 1 Watt
(4) 5725 - 5825 MHz 1 Watt n/a

ETSI(Europe) defines the power limits as Effective
Isotropic Radiated Power(EIRP). FCC(U.S.) defines the
power limits as Transmitter Power Output(TPO), with a
6 dBi antenna. So the EIRP at antenna will be 4 times
to TPO, i.e. 250 mW TPO will be 1 Watt EIRP.

Here is a nice little product.

Kensington WiFi Finder lets you know if your location is WiFi enabled. Just press a button and you know instantly.

Here is a New York Times article about it.

Gartner Analysts Project More Than 71,000 Public Wireless LAN Hot Spots in 2003

The number of public wireless LAN (WLAN) hot spots has risen from just over 1,200 in 2001 to more than 71,000 in 2003, but there are still not enough hot spot locations to meet user needs, according to Gartner Inc.

The number of WLAN hot spot users is forecast to reach 9.3 million users worldwide in 2003, up from 2.5 million users in 2002. North America will account for 4.7 million users in 2003, followed by Asia/Pacific with 2.7 million users and Europe with 1.7 million WLAN hot spot users.