The field of communication is experiencing a great deal of innovative changes that are creating a global village. Before the invention of the telephone, it was unimaginable that one could ever actually talk to somebody even twenty miles away. In the world of today, we can't even bring ourselves to picture what life would be like if we could not speak across oceans and continents.
To say, by much delving into the technical aspects of each system, GSM, TDMA, CDMA, NMT, D-AMPS etc are the systems using which the mobile phones work and in most case, a mobile phone from a system is not supported in other. So what all are that systems and how do they exist together in this mobile world?
GSM is one of the few mobile phone system widely adopted worldwide. GSM system for mobile phones is used in nearly 200 countries, from Europe to all over the World.
Technically said, the system utilizes the 900 MHz spectrum for its signals to travel over the air. GSM providers from Europe, Africa, and Asia later added additional spectrum of 1800 MHz. However, in North America, GSM service operates at 800 MHz or 1900 MHz.
The good news here for the world travelers is that most manufacturers offer Dual-band (900 and 1900 MHz), Tri-band (900, 1800 and 1900 MHz) and also Quad-band (800, 900, 1800 and 1900 MHz) mobile phones that these phones can be practically used anywhere the GSM systems are installed. But, countries like South Korea and Japan does not use GSM system for their mobile phone services. A mobile phone with tri-band should be one that global travelers should have to make them available for international roaming agreements from various GSM carriers worldwide.
* Another most lucrative property that allures the millions of music loving hearts is the digital voice recoding features that allows eight hours of continuous recording for 128M. The device also supports VOX recording.
To say, by much delving into the technical aspects of each system, GSM, TDMA, CDMA, NMT, D-AMPS etc are the systems using which the mobile phones work and in most case, a mobile phone from a system is not supported in other. So what all are that systems and how do they exist together in this mobile world?
GSM is one of the few mobile phone system widely adopted worldwide. GSM system for mobile phones is used in nearly 200 countries, from Europe to all over the World.
Technically said, the system utilizes the 900 MHz spectrum for its signals to travel over the air. GSM providers from Europe, Africa, and Asia later added additional spectrum of 1800 MHz. However, in North America, GSM service operates at 800 MHz or 1900 MHz.
The good news here for the world travelers is that most manufacturers offer Dual-band (900 and 1900 MHz), Tri-band (900, 1800 and 1900 MHz) and also Quad-band (800, 900, 1800 and 1900 MHz) mobile phones that these phones can be practically used anywhere the GSM systems are installed. But, countries like South Korea and Japan does not use GSM system for their mobile phone services. A mobile phone with tri-band should be one that global travelers should have to make them available for international roaming agreements from various GSM carriers worldwide.
* Another most lucrative property that allures the millions of music loving hearts is the digital voice recoding features that allows eight hours of continuous recording for 128M. The device also supports VOX recording.
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