About IP Telephony

[pma]

IP Telephony is also known as Voice over IP or Internet Telephony and
it represents the technology which uses IP-based data networks to
transmit telephone calls. It is an evolution that will widely affect
corporate telecommunications in the future.

IP telephony enables companies to place telephony calls over IP networks instead of public switched telephone networks. Currently IP telephony offers cheaper call prices than the standard public switched telephone network otherwise known as PSTNs.

IP telephony is a major networking issue today and there are a numbers of PC telephony providers(you can get the providers' lists at http://www.iphone.shows.it) who are trying to offer a different solution to beat their competitors.
Who will win?