Multiple access technology allows multiple cell phones to use one tower at once. The two major types of multiple access are CDMA and TDMA/GSM.
CDMA technology allows multiple user by spreading signals over multiple frequencies. TDMA/GSM gives each phone different, microscopic time slots.
Code Division Multiple Access or CDMA cell phones utilize a technology that permits the use of several frequencies at the same moment to send and receive data and voice transmissions. CDMA is newer radio technology that is designed to compete with the older Global System for Mobile Communications (GSM) network. As a result, CDMA phones cannot use GSM cell towers. Another difference is that GSM phones use SIM cards while CDMA phones do not.
Orthogonal Frequency Division Multiple Access. It has something to do with the way cell phones transmit signals.
Cell phones
the cell phones
They made phone calls with them.
Advancing
cell phones
cell phones...
no infrared
Yes
cell phones would probably have a more advanced look and technology
Cell phones are changing constantly. The latest in cell phones is the smartphone, such as the iPhone. In the future, phones will continue to give us more access to data and be smaller and smaller.