1876 Mr Graham Bell invented the telephone
1894-1906 Marconi develops wireless communication...ermm so call radio today
ermmm back to the issue
mobile phone isn't a phone at all... it's a Radio with 2 frequencies, say like a walkie talkie.. while using it, it is like RX and TX on the same time...
p/s di ceduk dan di infokan..heheheh
for more info pls refer to Dicovery Mag issue April/May 08
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buluh perindu
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1 comment:
tu... full duplex..... katenyerrrr
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