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Welcome to The Blue Dot!

What is CDMA Technology?

CDMA stands for Code Division Multiple Access a cellular technology orginally known as IS-95, competes with the dominating GSM technology in the cellular world. There are now different variations of CDMA in the cell phone world, but the original CDMA is now known as cdmaOne.

CDMA uses a "spread-spectrum" technique whereby electromagnetic energy is spread to allow for a signal with a wider bandwidth. This allows multiple people on multiple cell phones to be "multiplexed" over the same channel to share a bandwidth of frequencies.

With CDMA technology, data and voice packets are separated using codes and then transmitted using a wide frequency range. Since more space is often allocated for data with CDMA, this standard became attractive for 3G high-speed mobile Internet use.

The CDMA standard was originally designed by Qualcomm in the U.S. and is primarily used in the U.S. and portions of Asia by other carriers. Sprint, Verizon Wireless, Alltel, US Cellular and Cellular South use CDMA while T-Mobile and AT&T use GSM.