Telecommunication expenses have been a hot topic of discussion among organizations and CIOs who want to reduce the unnecessary business communication expenses. In a bid to curtail the costs, organizations are switching from the TDM services to SIP. The latest SIP technology has several advantages and the SIP trunks are deployed using two different models – distributed and centralized. Both the models have their individual merits and demerits and as the technical head of your company, you will have to weigh the pros and cons carefully before finalizing.