The usage of IP telephony technology is considered as a medium to long-term business. And, according to the studies, the packet-switched networks that are used for voice communication is more economical than the circuit-switched networks. The rationale being is that the circuit-switched network makes use of the entire communication line for just one conversation as compared to the packet-switched network. Hence, the cost will automatically rise. Further, when the communication line travels among different locations or cities or states or countries, then using a private network is secure and far more cost-effective than employing the public network. In the nutshell, IP telephony is a much more reasonable and viable option than the legacy telephone solutions.