Wireless Glossary of Terms

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TCP/IP (Transmission Control Protocol/Internet Protocol): A protocol permitting communications over and between networks, the TCP/IP protocol is the basis for the Internet communications. 

TDMA (Time Division Multiple Access): A technological standard that permits the transmission of information by dividing calls into time slots, each one lasting only a fraction of a second. Each call is assigned a specific portion of time on a designated channel.  By dividing each call into timed ‘packets,’ a single channel can carry many calls at once.    

Telecommunications Relay Service (TRS): A telephone service that allows persons with hearing or speech disabilities to place and receive telephone calls.
 
Third-Generation (3G): A general term that refers to technologies which offer increased capacity and capabilities delivered over digital wireless networks.   
  
Tri-Band Handset: Phones that work on multiple frequencies, typically in the 1900 MHz, 800 MHz, and 900 MHz frequencies used in the U.S. and elsewhere.
 
Tri-Mode Handset: Phones that operate in different modes, such as the CDMA, TDMA, and analog standards.
 
UMTS (Universal Mobile Telecommunications Systems): This is third generation technology generally based on W-CDMA (Wideband Code Division Multiple Access). UMTS promises a communications speed between 384 kbps and up to about 2 Mbps.
 
VoIP (Voice over Internet Protocol): VoIP is not simply capable of delivering voice over IP, but is also designed to accommodate two-way video conferencing and application sharing as well. Based on IP technology, VoIP is used to transfer a wide range of different type traffic.
 
Voice Recognition: The capability for wireless phones, computers and other devices to be activated and controlled by voice commands.  

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