Lumen is winding down voice services: what your business should do next

Large enterprises often find voice services scattered across business units through acquisitions and legacy contracts. It's common to discover CenturyLink, Qwest, Embarq, or other inherited services still underpinning part of the estate.

Check what runs underneath your phones, not just the name on your invoice. The affected services are SIP trunking, Voice Complete, PRI and POTS lines, toll-free, and hosted Teams or Zoom voice sold through Lumen. Crucially, this applies even if your bill reads CenturyLink, Qwest, CenturyTel, US West, or Embarq, because those are all Lumen brands. If any part of your voice connectivity is delivered by Lumen, including where it's resold or bundled inside another service, you are in scope, even if the word "Lumen" appears nowhere on your statement.

Lumen has stopped selling and renewing business voice. As of August 1, 2026, Lumen no longer writes new contracts for SIP trunking, Voice Complete, PRI and POTS lines, toll-free, or hosted voice for Microsoft Teams and Zoom. Existing services are not disappearing overnight. This is an end of sale, not an end of life, and current contracts continue through their agreed term. The advantage of acting early is that you have more flexibility over when you migrate, who you migrate to, and how the transition is planned.

What changes is what happens at the end of that term. Every Lumen voice contract now has a defined end date, and the businesses that plan before renewal have more flexibility around cost, timing, provider selection, and migration planning. Here's how to read your exposure and plan accordingly.

Does Lumen's announcement mean you need to do anything today?

Nothing about Lumen exiting voice requires action today, but it is the moment to start planning for what comes next. Your phones keep working and your contract is honored to term, so the focus should be what happens once that term ends.

Once an affected contract runs out, the service typically drops to a month-to-month arrangement on a product line Lumen is no longer selling or investing in. The bigger challenge is often operational. If your business needs new numbers, additional SIP capacity, new locations, contact center changes, or acquisitions integrated into the environment, those requests may become harder to support on services that are no longer being actively sold.

Planning ahead of the renewal date is what keeps those options open, which is why "we'll deal with it when the contract comes up" is an approach you may want to avoid.

How do you know if your business is affected?

Large enterprises often find voice services scattered across business units through acquisitions and legacy contracts. It's common to discover CenturyLink, Qwest, Embarq, or other inherited services still underpinning part of the estate.

Check what runs underneath your phones, not just the name on your invoice. The affected services are SIP trunking, Voice Complete, PRI and POTS lines, toll-free, and hosted Teams or Zoom voice sold through Lumen. Crucially, this applies even if your bill reads CenturyLink, Qwest, CenturyTel, US West, or Embarq, because those are all Lumen brands. If any part of your voice connectivity is delivered by Lumen, including where it's resold or bundled inside another service, you are in scope, even if the word "Lumen" appears nowhere on your statement.

Which voice services should you review? 

Voice usually touches more of your business than a single bill suggests, so map every place it appears before you plan a move:

• SIP trunks: The connectivity carrying calls to and from your PBX or calling platform, and often the primary service that will need to migrate.
• PSTN connectivity: How your calls reach the public network, including any remaining PRI circuits or POTS lines still in service.
• Session Border Controllers (SBCs): Review whether SBCs, routing policies, failover configurations, or certificates are tied to the existing provider and need updating during migration.
• Toll-free: Your 800 and 888 numbers and their routing, which need porting and testing like any other number.
• Contact center: The trunks and numbers feeding your contact center platform, often the most intricate piece to move and the one to scope first.
• Emergency calling: E911 registration and caller-location routing, which must carry across exactly, with no gap at cutover.

Do you need to replace your phone system?

You almost never need to replace your phone system for this. Lumen is stepping back from one layer, the carrier connectivity beneath your phones, not the phones or the platform on top of them.

In practice, your PBX stays, your Microsoft Teams, Webex Calling, or Zoom Phone setup stays, and in most cases your handsets and numbers stay too. What moves is the SIP and PSTN connectivity underneath, transferred to a new provider with your numbers ported across so the change is invisible to your users. A move away from Lumen doesn't mean starting over. Teams, Webex, Zoom, and your PBX can stay exactly where they are, while the carrier services underneath are replaced.

What should you do before your contract expires?

The move has a natural order, and working backward from your renewal date keeps it unhurried:

1. Find your contract and renewal date

   Locate the Lumen, CenturyLink, or Qwest voice agreement and note when the term ends. That date anchors the entire plan.

2.  Inventory what runs on it
   List every trunk, DDI range, toll-free service, E911 registration, contact center integration, fax service, and legacy line tied to Lumen voice.
   
   If your organization has grown through acquisitions, validate that inherited CenturyLink, Qwest, or other Lumen-branded services have been included.
3. Evaluate providers against your setup
   Compare options on migration track record, number porting, coverage, support model, and commitment to voice.
4.  Build a migration plan around your date
   Sequence porting, cutover, and testing so the move completes before the term ends rather than after it.

But how long does this all take? Porting and cutover take anywhere from a few weeks for a small SIP setup to a few months for multi-site or contact center migrations, driven mostly by how many numbers and locations are involved. A good rule is to begin three to six months before your renewal date, and sooner if you run a contact center or have international sites. Starting earlier gives you more flexibility around porting dates, testing windows, implementation schedules, and provider selection.

What should you look for in a replacement provider?

Replacing a carrier isn't the same as replacing a phone system, and the right provider makes the swap something your users never notice. Weigh candidates on:

• Migration experience: A documented process and a named project manager who has run voice cutovers before, not a self-serve port you manage alone.
• Number porting: The ability to bring all your numbers, local and toll-free, across cleanly, with testing before the switch.
• Global reach: If any of your sites are international, coverage and number management in those countries on a single contract, rather than stitched-together local carriers.
• Global number management: For multinational organisations, evaluate how local numbers, regulatory requirements, and emergency services are handled across countries.
• Support model: Direct access to the people doing the work, especially mid-cutover, instead of a ticket queue.
• A lasting commitment to voice: A provider for whom voice is a core business, so you aren't repeating this same exercise in a couple of years.
• Voice network expertise: Understand whether the provider owns and operates voice infrastructure, manages routing internally, and has voice engineering teams available during migrations and major incidents.

On numbers, one of the most common questions is whether existing numbers can be retained: local and toll-free numbers can generally be ported to a new provider, so your business keeps every number it has today.

How Pure IP fits

Lumen's announcement highlights the importance of choosing a provider with a long-term commitment to voice services, established migration experience, and the ability to support future growth.That's where Pure IP fits. We take over the connectivity layer, SIP trunking and PSTN replacement, port your numbers and toll-free, carry your E911 and contact center connectivity, and leave Microsoft Teams, Webex Calling, Zoom Phone, or your existing PBX exactly as they are, with a dedicated project manager and direct access to the engineers running the cutover, in 137 countries where your sites need it. Because voice is core to our business, we continue to invest in the platforms, engineering expertise, and global coverage needed to support enterprise voice environments.

If it helps to map your options against your renewal date, talk to our team and we'll review your current setup and lay out a plan while there's still time on your side.

Final thoughts

Businesses that start early get the widest set of options and carry the least risk. A structured approach, contract and inventory first, then provider and plan, keeps you in control of the timeline, the technology, and who you choose, rather than reacting to a renewal notice after your leverage has slipped away. The end of sale hands you a window. Using it early is what turns a forced change into a planned upgrade.

Frequently asked questions

What happens when a Lumen voice contract expires?

When a Lumen voice contract reaches the end of its term, the affected services typically convert to a month-to-month arrangement on a product Lumen no longer sells or develops. Your service continues, but pricing and flexibility tighten, which is why moving before the term ends leaves you in a far stronger position than waiting.

How long does a voice migration take?

A voice migration takes anywhere from a few weeks to a few months, depending on size and complexity. A small SIP setup sits at the short end, while multi-site or contact center migrations run longer. The main variables are the number of phone numbers to port, porting timelines, and testing, and starting early is the biggest lever you have over the schedule.

Can I keep my contact center?

You can usually keep your contact center. The platform itself stays in place; what changes is the voice connectivity feeding it. A provider experienced with contact center and legacy integrations can move the trunks and numbers underneath without forcing you to replace the platform.