Why internet calling is so cheap?

@ngm_syd (1087)
India
November 27, 2006 2:13am CST
can any one tell me this?
5 responses
@macubx (11433)
• Philippines
27 Nov 06
because you dont have to pay for third party companies..
@ngm_syd (1087)
• India
27 Nov 06
Thank you
@tibido (4081)
• Italy
27 Nov 06
it's voip technology
@ngm_syd (1087)
• India
27 Nov 06
and how it works, Thank you
@yogitha (1893)
• India
27 Nov 06
this is international item
• India
27 Nov 06
don't know
@ankscorek (567)
• Djibouti
27 Nov 06
internet calling is cheap coz it uses packet switching which utilises the gaps in packet to transmit your voice data..it does not have fully dedicated circuits as in telephone