Keep a small analog footprint connected to modern voice infrastructure without overcommitting on day one. The AudioCodes MediaPack 5xx MP502/2S/SIP provides 2 FXS voice interfaces and a software-upgradable option to 4 FXS, giving infrastructure teams a practical path for staged telephony migration. This model is built for environments where only a few analog endpoints remain, but those endpoints still matter. It helps preserve service for phones and other FXS-dependent devices while aligning them with SIP-based communications. The upgrade path adds planning flexibility: deploy for current demand, then expand if the site grows or if more legacy devices need to stay online. For procurement, that means tighter initial spend without painting the project into a corner. For IT operations, it means fewer disruptions, simpler rollout planning, and a gateway that matches the real size of the analog requirement. In branch offices, small departments, and remote locations, that balance is often the difference between a temporary workaround and a clean migration strategy.