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Pakistan is in the period of upgrading communication infrastructure. Therefore many communication techniques are taking birth day by day and building the effective way of communication and one of many is IP Telephony system. In Pakistan the adoption of IP telephony is slow because of variety of reasons, but the main factor is the reliability of legacy phone systems. With a weak economy in Pakistan, the management team of organizations is happy to get as much mileage as possible out of their existing infrastructure, and if the legacy phones are working fine, IT team will need a really strong reason to change it to IP telephony. The purpose of this independent study is to drive the correct adoption of new IT & communications technologies in Pakistan to enable increased productivity and added value for businesses. This paper investigates the issues of service quality and cost lie in Pakistan and on the basis of this issues what steps we need to consider while deciding to implement VoIP. After implementation of VoIP in two different organizations and we then analysis their comparative results with legacy phone systems.