Starting of Communication Era
A Quick Remind:
In 1983, a analog mobile phone system working at 850MHz came in USA called Advanced Mobile Phone System(AMPS).
In 1991, Global System for Mobile Communication(GSM) started working at
900MHz and uses
124 full-duplex channels
In 1991, Digital European Cordless Telephone(DECT)
with spectrum of 1900MHz and 100-500Mtr. range and 120 duplex channels to carry 1.2Mbit/s of data transmission.
The IMT-2000 Defined world wide frame work for future mobile communication
at 2.00GHz
In 2005-06, the GSM has initiated to use the spectrum of 2600-3000MHz.
From then onwards all of us know that Telecommunication boom and will more and more in near future in terms of economization & upgradation .
In 1991, Global System for Mobile Communication(GSM) started working at
900MHz and uses
124 full-duplex channels
In 1991, Digital European Cordless Telephone(DECT)
with spectrum of 1900MHz and 100-500Mtr. range and 120 duplex channels to carry 1.2Mbit/s of data transmission.
The IMT-2000 Defined world wide frame work for future mobile communication
at 2.00GHz
In 2005-06, the GSM has initiated to use the spectrum of 2600-3000MHz.
From then onwards all of us know that Telecommunication boom and will more and more in near future in terms of economization & upgradation .
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