Internet Telephony is a hardware or software thata#39;s permits people to make telephone call using internet as medium. Internet telephony provides free of cost call but does provide similar quality as compared to PSTN or ISDN. Fig 1.1 VoIP ... And these companies allowing users to make international call for new cents. VoIPanbsp;...
|Title||:||VoIP(Asterisk Server Management)|
|Publisher||:||Faizan Hashmi - 2014-11-25|