Migrating from TDM PBX to IP PBX offers significant long-term savings despite possible upfront costs. Nemertes research shows organizations with all-IP environments spend less per unit ($677) compared to mixed TDM/IP systems ($735), saving an average of 8% annually, with large enterprises saving up to 26% after full IP deployment. IP PBX reduces call costs through VoIP, offers 20–50% savings with SIP trunking, and is easier to maintain with fewer components and remote administration. It also scales flexibly with licenses or subscriptions, while softphones and modern devices enhance mobility and reduce hardware dependency.

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