| |
Pupose |
Frequency |
Range |
Speed |
Devices |
| |
|
|
|
|
|
|
802.11a |
Wireless Internet access |
5GHz |
25 to 75 feet indoors; range can
be affected by building
materials |
Up to 54Mbps |
Laptop
computers, PDAs, cell phones |
| |
|
|
|
|
|
|
802.11b (Wi-Fi) |
Wireless
Internet access |
2.4GHz |
Up to 150 feet
indoors; range can be affected
by building materials |
Up to 11 Mbps |
Laptop computers, PDAs, cell
phones |
| |
|
|
|
|
|
|
802.11g |
Wireless Internet access |
2.4GHz |
Up to 150 feet indoors; range
can be affected by building
materials |
Up to 54Mbps |
Laptop
computers |
| |
|
|
|
|
|
|
Bluetooth |
Wirelessly
connect computer peripherals,
such as printers, PDAs, cameras |
2.4GHz |
Up to 33 feet
(10 meters); range can be
affected by building materials |
720Kbps |
Printers, cameras, cell
phones, PDAs, other peripherals
|
| |
|
|
|
|
|
|
GSM |
Digital cellular telephone
system; most-used system
worldwide |
900MHz, 1,800MHz, 1,900MHz |
Determined by host network |
Determined by host network |
GSM-enabled
cell phones, PDAs, pagers |
| |
|
|
|
|
|
|
GPRS |
An interface
overlaid on existing GSM
networks to allow for Internet
access |
Determined by host network |
Determined by
host network |
Theoretical
maximum speed of 171Kbps;
reality is 40-50Kbps |
GPRS-enabled cellular phones
and networks |
| |
|
|
|
|
|
|
CDMA |
Digital telephone system |
800MHz, 900MHz, 1,700MHz,
1,800MHz, 1,900MHz |
Coverage area of host network |
14.4Kbps data rate; a revised
CDMA standard offers 64Kbps |
Mobile
phones on CDMA networks |
| |
|
|
|
|
|
|
CDMA2000 |
Third generation
CDMA-based network |
Any existing band |
Coverage area of
host network |
144Kbps; future
speeds are estimated as high as
4.8Mbps |
Mobile phones on CDMA2000
networks |
| |
|
|
|
|
|
|
CDPD |
System used to transmit data
over analog cellular networks |
800MHz, 1,900MHz |
Coverage area of host network |
19.2Kbps data rate |
Cellular
phones, PDAs, pagers |
| |
|
|
|
|
|
|
TDMA |
Digital cellular
telephone systems |
800MHz, 1,900MHz |
Coverage area of
host network |
64Kbps to 120Kbps
data rates |
TDMA cellular phones |
