What to do with old Avaya digital phones in 2026

If you're a UK business with a stack of old Avaya desk phones — the 1408, 1416, 9504, 9508 style handsets on secretaries' desks and reception counters — you've probably got a small headache coming. The PSTN switch-off is scheduled for January 2027. Avaya as a company came out of Chapter 11 bankruptcy in May 2023 and the digital hardware you've got is officially in maintenance-only status with no future roadmap.

The kit still works. But the market around it is winding down, and at some point the pragmatic answer is "let's not have these in the cupboard anymore." This is a plain-English walkthrough of your options, with honest expectations on each.

Four practical options

Option 1 — Keep running the estate as-is. If you've already got an Avaya IP Office powering these handsets, and everything works, you can convert your incoming lines from ISDN to SIP trunks and keep the estate running. Realistically two to four more years of life before the cost of maintaining end-of-life kit starts to exceed the cost of a cloud UC replacement.

Option 2 — Migrate to something newer and keep the old kit as spares. Move the day-to-day traffic to Microsoft Teams Phone, Zoom Phone, or a set of dedicated SIP handsets from Yealink, Poly or Grandstream. Keep a few reset Avaya units on a shelf for the failing-handset scenario. Common pattern in professional-services firms.

Option 3 — Sell what's worth selling. A refurbisher (we're one of them) will assess the lot and either pay you, take it free, or in some cases charge for clearance depending on the shape of the collection. This gets the kit off your premises with paperwork proving the wipe was done properly.

Option 4 — Certified disposal. WEEE-compliant destruction with a Certificate of Destruction. Fine if none of the above suits, but you lose any recovery value.

Most firms end up with a mix. Some handsets get kept, some get sold, some get scrapped. Case-by-case is normal.

About the value

There's a question we get asked a lot, and it's fair: what are these actually worth?

It depends on the lot. The underlying point worth accepting up front though: expensive when new doesn't mean valuable now. An Avaya digital handset that cost £200 in 2012 doesn't have £200 left in it. Old kit that was expensive at the time still won't hold up for the buyer's day-to-day use. Screens fault. Older models don't run modern firmware. Even in good condition, most people are going to want to spend a bit more for something newer.

The 9600-series IP phones (9608, 9611G) hold more of their value than the 1400-series digital phones. The J-series SIP handsets hold more again. But nothing on the market is treating any of it as high-value stock.

If you go to a refurbisher expecting retail-adjacent numbers, you'll be disappointed. If you go expecting a fair exchange for kit that's slowly running out of runway, you'll get one.

The data that lives on the handset

Before you move any of these phones on, understand what's on them.

An Avaya 1408 or 1416 handset stores its own local phonebook (up to 268 names and numbers, held in the phone's own memory), a full call log with timestamps, and the text labels on all the programmable line keys. On a law firm's reception phone, those labels often include partner names and client references. On a fee-earner's phone, the call log includes every outgoing dial.

The IP models (9608, 9611G, J-series) also store SIP or H.323 credentials, the provisioning server URL, any TLS certificates, and network config.

None of it is encrypted at rest.

The compliance angle, without the fear

Under UK GDPR, a business is required to implement appropriate technical measures to prevent unauthorised access to personal data (Articles 5 and 32). Handing hardware to a third party without wiping local personal data is a plausible failure of that duty. For SRA-regulated law firms, there's an additional confidentiality obligation under Paragraph 6.3 of the Code of Conduct.

That said, don't let anyone frighten you with ICO fine numbers. ICO enforcement activity has been at a multi-year low. The realistic risk isn't the regulator turning up with an invoice. It's the compliance-audit conversation with a client who wants to know how their old data was handled, and you not having good paperwork.

That's what a serial-logged Certificate of Sanitisation solves. It's evidence you can put in a folder and produce on demand.

How the factory reset actually works

On the IP models (9608, 9611G, J-series), you press Mute, dial 27238# (that spells C-R-A-F-T), and select Clear from the hidden Craft menu. Takes about 30 seconds per handset. Full instructions in our factory reset guide.

On the digital models (1408, 1416, 9504, 9508), it's a menu-based erase, but the handset can only be reset while it's connected to and powered by an Avaya PBX. If your PBX has already gone, you cannot reset these handsets yourself.

Where we come in on that last point: we keep an Avaya IP Office in-house specifically to reset digital handsets that arrive without a live PBX. Nothing exotic — it's just a specific bit of kit that's not on every refurb operator's bench.

What we'd suggest

If you've got a rough idea of what you've got and want to move it on, send us a message through the contact page with:

Roughly how many handsets, and which models if you know them.
Whether the PBX is still running or already gone.
Location and access notes.
Whether you want a firm-quote answer or you're happy with a rough conversation first.

We'll come back within a working day with a straight answer. No wheeler-dealer, no pressure to decide today, just a plain conversation about the lot in front of you.