When did the landline telephone and VoIP appear?
Can anyone tell me the time that the first landline telephone and VoIP appeared?
When did the landline telephone and VoIP appear?
Can anyone tell me the time that the first landline telephone and VoIP appeared?
1875 telephone invented
1877 first long distance lines installed
1915 first coast to coast long distance call
1947 plan devised for cellular telephones
1951 first transcontenental direct dial long distance call
1973 first cellular telephone call
1979 first commercial cell phone service (in tokyo)
1984 first cell phones commercially available motorola dynatac 8000x
1991 2G cellular GSM technology launched
1995 first commercial internet phone software released
1997 first soft switch
1999 SIP created
1999 3g cellular launched