For organizations that depend on Lumen for enterprise voice, August 2026 opened an important strategic planning window. As of August 1, Lumen stopped new sales and renewals of voice offerings, including services such as SIP and Voice Complete.1 Existing services continue to operate, and there is no announced end-of-life date.2
Consequently, many IT leaders are now asking the same question: “What should our voice strategy look like next?”
That question deserves careful consideration. This is not a reason to make a rushed technology decision. It is an opportunity to assess what enterprise voice needs to look like over the next several years.
What Comes Next for Lumen Voice Customers?
There is no single path forward for existing Lumen customers. Organizations can move their voice services to another service provider, use the transition to modernize their communications strategy directly or work through a trusted channel partner. The right approach depends on existing infrastructure, business priorities and how much change the organization wants to make.
Here are five questions worth asking before choosing a migration path.
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What Exactly Needs to Move and When?
Before evaluating replacement services, organizations need a clear picture of what they have today. That means understanding contract dates, telephone numbers, SIP trunks, local services, toll-free numbers, legacy lines and the applications that depend on them.
The immediate objective should be visibility. Which services are business-critical? Which contracts expire first? Which sites or applications would be hardest to migrate? Answering those questions creates a realistic sequence rather than treating the entire voice estate as one migration project.
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Are You Replacing a Carrier or Modernizing Voice?
A contract event can easily become a like-for-like procurement exercise. That may be appropriate for some environments, but organizations should first consider whether their communications strategy has changed since the original agreement was signed.
Enterprises using Microsoft Teams now have several options for PSTN connectivity, including Calling Plans, Operator Connect, Teams Phone Mobile and Direct Routing3. Beyond Teams, organizations should also evaluate interoperability, survivability, voice resiliency and long-term flexibility as part of their overall communications architecture. Modernization is also an opportunity to evaluate capabilities that may not have existed when the original environment was deployed, including conversational AI, meeting intelligence, automated voice applications and modern contact center experiences.4
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What Must Be Preserved During the Transition?
Modernization does not mean replacing everything that already works. Many enterprises still depend on existing PBXs, contact center platforms, analog devices, established telephone numbers or specialized routing requirements.
Those dependencies should be identified early and incorporated into the migration design. A phased approach can preserve critical infrastructure while introducing new cloud services where they provide a clear operational benefit.
This is particularly important for complex or multinational organizations, where a single migration model may not make sense across every site, employee group or application.
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How Much Flexibility Will You Need Next Time?
The current market change also raises a bigger strategic question: how dependent should an enterprise voice architecture be on any single carrier or platform?
Direct Routing connects Teams Phone through a chosen PSTN operator using a certified session border controller, while Operator Connect provides a more operator-managed approach5. Microsoft also supports combining PSTN connectivity models within the same organization.6
That flexibility can be valuable well beyond the current migration. It gives organizations more choices when requirements, providers or business priorities change again.
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Who Should Help You Make the Move?
Every organization’s modernization path will be different. Some will transition to a new service provider. Others will use this as an opportunity to modernize around Microsoft Teams or another UCaaS platform like Webex or Zoom, while some will choose to work with a trusted channel partner or systems integrator. Many may also take the opportunity to replace ageing voice infrastructure, introduce AI-powered customer experiences or undertake a broader communications transformation.
The common denominator is having a partner that can support whichever path makes the most sense – not one that forces a predetermined solution. With more than three decades of field-proven telecommunications experience, AudioCodes can support each of these approaches. Our role is not to prescribe a particular carrier destination, but to help organizations build a practical modernization strategy and migration architecture tailored to their business goals, existing investments and long-term communications roadmap.
That could mean transitioning to Microsoft Teams voice, Webex Calling or Zoom Phone, connecting to new service providers, preserving existing voice investments during migration, introducing AI-powered voice and customer experience capabilities and simplifying global voice management. Depending on business needs, this can include session border controllers, media gateways, Teams Phone connectivity, professional services and AI-powered applications such as Voca CIC, Meeting Insights and Live Hub.
Use the Deadline to Create Options, Not Limit Them
Lumen’s decision reflects a wider change in its business strategy. In its second-quarter results, Lumen said it was redirecting resources toward higher-growth digital opportunities and reported that strategic products had grown to 53% of total business revenue.7
For voice customers, the practical takeaway is simpler. Waiting until a renewal or transition becomes urgent reduces room to evaluate architectures, providers and migration sequences properly.
Organizations that begin planning now have the advantage of evaluating their options thoughtfully rather than reacting under pressure. Instead of asking, “What replaces Lumen?” they should ask, “What can our voice strategy become?”
That is a much more pertinent question, and one AudioCodes is well placed to help organizations answer with confidence.
FAQs
No overall end-of-life date had been announced as of Lumen’s August 2026 earnings discussion. The immediate change is an end of sale, with Channel Dive reporting that new sales and renewals stopped from August 1, 2026.8
Not necessarily. Teams Phone may be a strong option for organizations already invested in Microsoft Teams, but the right destination depends on existing infrastructure, geographic requirements, carrier strategy and business priorities.
Voice modernization can be phased around existing infrastructure, contracts and business priorities. Organizations can preserve voice investments that still meet their needs while gradually moving services to new providers, adopting Microsoft Teams Phone or introducing new cloud and voice AI capabilities over time.
AudioCodes can support modernization through service providers, channel partners or directly with enterprises. Its portfolio spans session border controllers, media gateways, IP phones and meeting room solutions, Microsoft Teams voice connectivity, professional services, contact center capabilities and powerful voice AI applications, allowing the migration path to follow the customer’s requirements rather than a predetermined destination.
1 https://www.channeldive.com/news/lumen-execs-defend-voice-exit-copper-q2/827269/
3 https://learn.microsoft.com/en-us/microsoftteams/pstn-connectivity
5 https://learn.microsoft.com/en-us/microsoftteams/pstn-connectivity
6 https://learn.microsoft.com/en-us/microsoftteams/pstn-connectivity
7 https://ir.lumen.com/news/news-details/2026/Lumen-Technologies-Reports-Solid-Second-Quarter-2026-Results-Digital-Transformation-Accelerates/default.aspx
8 https://www.channeldive.com/news/lumen-execs-defend-voice-exit-copper-q2/827269/
