Wireless Internet Modem for Laptop, Verizon Wireless Internet Modem

Different wireless networks use proprietary protocols, and wireless modems are certified as compatible with certain architectures. Some protocols, such as CDPD, GPRS and EDGE, are even slower than dialup; while Cellular UMTS and 1xRTT wireless networks can operate at about 300 kilobits per second. A newer cellular flavor presented by Verizon and Sprint, EVDO, advertises speeds of 400-700 kbs, rivaling broadband packages. Future technologies promise even greater speeds.

Another popular network for mobile wireless modems is Wireless fidelity (Wi-Fi), which can operate at approximately 400 kbps. WiFi is commonly used in Internet clubs and other hotspots. WiFiMax is a recent standard that offers even faster speeds and more features.

Since wireless modems are certified as being compatible with specific standards and protocols, you should make sure that the modem you are buying has the capabilities required for the network or networks you want to connect to.

Here are the general features to look for in wireless modems:

• Modem speed
• Maximum signal strengthFrequency band (900mhz, 2.4 GHz, 5 HHz, 23 GHz, VHF, UHF)
• Protocol supported (CPCD, Ethernet, GPRS, EVDO, Wi-Fi, ISDN, etc)
• Radio technique (direct sequence spread spectrum or frequency hopping)
• Full duplex capability vs. half-duplex

DSL or cable Internet access in your home or office can also be set up with a wireless broadband modem. In this case all computers in the household can communicate with the broadband modem through wireless network adapter cards. The wireless network cards should be of the same manufacturer as the wireless modem/router, or clearly state they are compatible with such.