Avaya end of life: alternatives and how to migrate
If your Avaya phone system is reaching end of life or end of support, you do not need to like-for-like replace it. Most UK businesses move to a cloud phone system instead, which removes the on-site hardware, keeps your existing numbers through porting, and is ready for the PSTN switch-off on 31 January 2027. New on-premise kit that still depends on the old lines is a dead end, so the deadline is the natural moment to modernise.
Is Avaya reaching end of life?
Avaya was, and remains, a serious enterprise communications platform. Its systems have run the phones of large UK organisations for years and did the job reliably. The picture worth understanding in 2026 is about support lifecycles, not quality.
Based on publicly available information as of June 2026, Avaya has published end of manufacturer support timelines for a number of its platforms and has refocused its strategy on larger enterprise and cloud deployments. Reporting indicates that certain platform versions have reached or are approaching end of manufacturer support around 2026, and that Avaya has scaled back support for some smaller cloud and trunking offerings; confirm the exact dates and product scope with Avaya for your system. Older on-premise generations, in particular, reach end of support as the product line moves on.
The practical takeaway is simple. Do not rely on a general headline; check the exact end of sale and end of manufacturer support dates for your specific Avaya model and version, directly with Avaya or your maintenance partner. Once a system passes end of manufacturer support, you stop receiving security patches and official fixes, and spares and engineering knowledge become harder to source. That is the trigger most businesses act on.
Your options when Avaya reaches end of support
When a system passes end of support you are not forced to do anything overnight, but you do have a decision to make. There are three broad paths, and they suit different situations.
- Extended or third-party maintenance. Specialist firms can keep an out-of-support Avaya system running for a period. This buys time but does not solve the underlying issue: no new security patches from the manufacturer, and a system still tied to lines that are being switched off.
- Buy newer Avaya equipment. Staying with the vendor is an option, especially for very large or heavily integrated estates. For most small and medium UK businesses, though, fresh on-premise hardware means another big upfront spend on technology that the 2027 deadline pushes towards the internet anyway.
- Migrate to a cloud phone system. Move the whole phone system to a hosted service reached through apps and IP phones. This is the route most UK SMBs now take. It removes the hardware, ends the maintenance bill and is ready for the switch-off from day one.
You can also mix these, for example taking short-term third-party maintenance while you plan and run a cloud migration in parallel, so there is no gap in service.
Why businesses move to the cloud, not like-for-like
The instinct when a phone system ages is to replace it with a newer version of the same thing. For most UK businesses in 2026 that is not the best move, and the reason is the 31 January 2027 PSTN and ISDN switch-off. The traditional lines that on-premise systems depend on are being retired across the UK. Buying new on-site hardware that still needs those lines is spending money on a foundation that is being removed.
Cloud sidesteps the problem entirely because it runs over your internet connection. Beyond being future-proof, it changes the economics. Instead of a large upfront purchase plus a maintenance contract, you pay a per-user monthly fee, typically £7 to £30 per user per month across the UK market, with no hardware to own and updates handled for you. It also fits how people work now: the same number rings on a desk phone, a mobile app and a browser, so staff are reachable in the office, at home or on the move. Features that needed extra Avaya hardware or licences, such as call recording, queues and IVR menus, become software settings, and modern platforms add call transcription, AI summaries and AI receptionists on top.
What to look for in an Avaya replacement
Once you decide to move to the cloud, the question is which provider. Compare on neutral, practical criteria rather than brand. This checklist covers what matters for a UK business leaving an on-premise Avaya system.
| What to check | Why it matters |
|---|---|
| UK calls inclusive | Avoid surprise per-minute charges; confirm UK landline and mobile minutes are bundled. |
| Number porting | You must be able to keep your existing geographic, 03 and 0800 numbers, ideally free. |
| Apps and devices | Mobile app, browser softphone and desk phone support, so each person uses what suits them. |
| Full PBX features | Auto-attendant, ring groups, call queues, business-hours routing and voicemail-to-email built in. |
| AI options | Call recording, AI transcription and an AI receptionist that can answer and route calls 24/7. |
| UK-based support | Local support that understands UK numbering, porting and the switch-off. |
| Contract length | Shorter, clearer terms give you flexibility; check what you are committing to. |
| Switch-off readiness | The system should run fully over the internet with no dependence on PSTN or ISDN. |
Voxora meets these as a UK cloud option with full PBX features, free number porting, mobile, browser and desk phone apps, an AI Receptionist that answers and routes calls 24/7, and a reseller model for agencies and MSPs. Weigh it alongside other UK providers on the criteria above.
How to migrate from Avaya and keep your numbers
A migration from Avaya to the cloud follows the same low-risk pattern as any on-premise to cloud move. Assess your current lines, numbers, users and any connected devices such as alarms or door entry. Choose a provider and plan. Build your users, menus and call routing in the new system while Avaya is still live. Start the number port, which the new provider manages while your old lines stay active, so there is no gap. Run both systems in parallel for a week or two, test thoroughly, then switch over and retire the Avaya hardware and its maintenance contract.
Your numbers come with you. Porting keeps your existing geographic, 03 and 0800 numbers and is usually free, typically completing in a few working days to around two weeks depending on the number type and the losing provider. On handsets, some IP phones can be re-provisioned to a new cloud system over SIP, while older Avaya-tied phones generally need replacing with IP phones, the mobile app or a browser softphone. Ask the new provider to check your exact phones upfront so you know whether to keep or replace them.
Frequently asked questions
Is Avaya reaching end of life?
Based on publicly available information as of June 2026, Avaya has published end of manufacturer support dates for several of its platforms and has refocused on larger enterprise and cloud deployments. Older on-premise systems in particular reach end of support over time. Check the exact end of support date for your specific Avaya model directly with Avaya or your maintainer, as dates differ by product and version.
What are my options when Avaya reaches end of support?
You have three broad options: pay for extended or third-party maintenance to keep the existing system running for a while, buy newer Avaya equipment, or move to a cloud phone system from any provider. Most UK small and medium businesses choose to migrate to the cloud, because the 2027 PSTN switch-off makes new on-premise kit a poor long-term bet.
Can I keep my numbers if I move away from Avaya?
Yes. Number porting lets you keep your existing geographic, 03 and 0800 numbers when you change provider. The new cloud provider handles the port and your old lines stay live until it completes, so there is no downtime. Porting is usually free and typically takes a few working days to around two weeks.
Will my existing Avaya handsets work with a new cloud system?
It depends on the model. Some IP handsets can be re-provisioned to register with a new cloud system over SIP, while older phones tied to the Avaya system usually need replacing with IP phones, the mobile app or a browser softphone. Ask the new provider to check your exact handset models before you migrate.
Do I have to replace Avaya before the 2027 switch-off?
If your system depends on traditional PSTN or ISDN lines, you must move to an internet-based service before the UK switch-off on 31 January 2027. Even if your Avaya hardware still works, the lines it relies on are being retired, so the deadline is a natural point to plan the move to a cloud system.
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