I thought I would post this in order to give you an idea of what CDMA is, since we post that Dotcom Wireless is featured on CDMA, the best, reliable network in AMerica! And, seeing that I am not techy enough to explain it in my own words I had to take some excerpts from the professionals. One thing I do understand is that the network Dotcom Wireless phones operate on means great coverage, speed, reliability, and connectivity, both to you the consumer and business person alike...
CDMA Network has coverage in every major city accross the U.S.
A Definition from Mobile Computing News: CDMA (code-division multiple access) refers to any of several protocols used in so-called second-generation (2G) and third-generation (3G) wireless communications. As the term implies, CDMA is a form of multiplexing, which allows numerous signals to occupy a single transmission channel, optimizing the use of available bandwidth. The technology is used in ultra-high-frequency (UHF) cellular telephone systems in the 800-MHz and 1.9-GHz bands.
CDMA employs analog-to-digital conversion (ADC) in combination with spread spectrum technology. Audio input is first digitized into binary elements. The frequency of the transmitted signal is then made to vary according to a defined pattern (code), so it can be intercepted only by a receiver whose frequency response is programmed with the same code, so it follows exactly along with the transmitter frequency. There are trillions of possible frequency-sequencing codes; this enhances privacy and makes cloning difficult.
The CDMA channel is nominally 1.23 MHz wide. CDMA networks use a scheme called soft handoff, which minimizes signal breakup as a handset passes from one cell to another. The combination of digital and spread-spectrum modes supports several times as many signals per unit bandwidth as analog modes. CDMA is compatible with other cellular technologies; this allows for nationwide roaming.
"Assuming that you or "your people" run around in areas covered equally by both networks, your next consideration should be the applications you are running. Strand divides applications into three tiers: light, medium and heavy. "Light applications" says Strand, "are ones like e-mail that don't require a lot of bandwidth. Medium apps are the type where you need real-time access to facts and figures and are submitting database queries and things of that nature. Heavy apps include streaming video clips, working with large images, or downloading big documents like PowerPoint or Word documents." Either network will suffice for applications whose maximum bandwidth requirement falls somewhere between medium and heavy, says Strand. But once you enter the world of heavy, CDMA is your only choice." - David Berlin, Which network--CDMA or GPRS?