The Federal Communications Commission is working to phase out time-division multiplexing (TDM) and legacy copper-based telephony networks. By late 2028, the FCC plans to finalize rules that will end interconnection mandates for these older technologies.
As a result, carriers are no longer required to maintain aging TDM infrastructure, accelerating the telecommunications industry’s shift to internet protocol (IP)-based services.
The N.C. Department of Information Technology’s contract for TDM services is still active. However, as providers notify us of their plans to discontinue legacy TDM services, all state, local, county, and education customers that use them through our legacy voice contract will be required to work with us to transition to modern, non-TDM technologies.
Any remaining services after the contract expires will be subject to significantly higher tariff rates.
Latest Updates
Oct. 1, 2026
- Legacy TDM services from AT&T have been retired; however TDM services from the remaining contracted providers remain supported and available.
- Customers are strongly encouraged to review their telecom inventory to assess continued need.
- NCDIT will be reaching out with additional information as other legacy carriers provide us with updates on their TDM service retirement plans.
Project Goals
- Engage with customers to discuss current telephony service inventories and alternate solutions.
- Collaborate with legacy TDM service providers to plan and transition legacy telephony technology. as identified.