A modem that uses radio transmission technology to transmit data between remote locations. A wireless modem is often used by mobile clients in locations where access to a terrestrial connection is not feasible.
A modem and antenna that transmits and receives over the air. Wireless modems come in several varieties, including units for CDPD, ARDIS, Mobitex, Ricochet, 802.11, OpenAir, BellSouth Intelligent Wireless Networks and other proprietary products.
Mobile phones can be employed as data modems to form a wireless access point connecting a personal computer to The Internet (or some proprietary network). In this use the mobile phone is providing a gateway between the cellular service provider's data network technology and Point-to-Point Protocol (PPP) spoken by PCs. Almost all current mobile phone models support the Hayes command set, a standard method of controlling modems.