What is a Wireless Modems?

Wireless modems are devices that allow computers to connect to a wireless local area network (WLAN) without physical cabling such as ethernet wiring. Wireless modems use cellular, satellite or WiFi protocols to connect to a WLAN, which can then provide Internet service. This differs from dial-up and DSL modems which use telephone lines to connect to the Internet, while cable modems use cable TV lines for connectivity.

Since wireless modems are certified as being compatible with particular standards and protocols, you should be sure the modem you purchase has the capabilities required for the network(s) you wish to connect to.

* Modem speed.
* Protocol(s) supported: Ethernet, CPCD, GPRS, ISDN, EVDO, WiFi, etcetera.
* Frequency band: 900mhz, 2.4 GHz, 5 HHz, 23 GHz, VHF and UHF.
* Radio technique: direct sequence spread spectrum, or frequency hopping.
* Number of channels for transmitting and receiving.
* Maximum Signal Strength.
* Full duplex capability vs. half-duplex (full duplex permits simultaneous transmitting/receiving for faster data transfer).

Wireless Modem

Wireless Modem

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