Zoom Phone & UCaaS Leadership (by GIS): Zoom Phone Migration by GIS (Immediate Cost Savings)

Finance and IT are treating Zoom Phone migration as a cost-control project, not an infrastructure refresh. The shift is to map current telephony spend line by line against Zoom Phone licenses and call patterns, then decommission underused legacy lines. Budget owners want clear monthly savings tied to specific numbers and extensions, not high-level projections. This requires more precise usage data, tighter coordination between telecom admins, and finance-ready reporting from day one.

• You stop paying for legacy trunks, circuits, and maintenance contracts that no longer match active usage.
• You gain a clean, finance-usable view of per-user and per-site voice costs within a single system.
• You can prove realized savings in-month, which protects future collaboration and UCaaS budget.
• You reduce support overhead by shrinking the number of systems and vendors your team must manage.

Teams start by exporting current carrier bills, PBX license lists, and support contracts into a single cost baseline. They align these records to Zoom Phone user assignments, call queues, and site configurations so each extension has a before-and-after cost. IT plans cutover waves by which circuits and contracts can be terminated after each wave. Finance receives a simple mapping of "old service" to "Zoom Phone" with target disconnect dates. This allows finance to track actual savings by month and validate that legacy services are removed on schedule.

This week, have IT and finance draft a shared list of current telephony cost line items, and their planned Zoom Phone replacements.

• Pull the last three months of carrier and PBX invoices and normalize them into a single list of services and costs.
• Map each major cost line to a Zoom Phone configuration element such as users, sites, or call queues.
• Define disconnect criteria and dates for each legacy line or contract based on your migration phases.