Avaya Partner ACS End of Life & Replacement

System type

Analog key system (Partner ACS)

Status

Discontinued

Manufacturer support

Ended

In service

1990s–2010s

The Avaya (originally AT&T/Lucent) Partner Advanced Communications System put analog key-system phones — the Partner 18D and 34D sets — on the walls of countless small businesses. Avaya has discontinued it, and the analog design that made it simple is now the thing holding you back.

A Partner ACS can't do remote work, can't ring a mobile app, and depends on copper lines carriers are phasing out. fvoip gives you the same easy front-desk experience with none of the box in the closet.

Why it's time to move.

Discontinued and unsupportedAvaya no longer manufactures or fully supports the Partner ACS — parts come from the secondary market only.
Copper line dependencyPartner runs on analog lines that carriers are retiring, often with rising costs and shrinking availability.
No mobility or remote workThere's no softphone or mobile extension — the system ends at the wall jack.
Aging processor modulesWhen a Partner ACS processor or expansion card fails, replacements are used, unwarranted, and getting scarce.

End-of-life and support details reflect published information at the time of writing and can change — always confirm current status with the vendor.

Your migration, step by step.

We rebuild your call flows on fvoip — auto-attendant menus, ring groups, business hours, and voicemail boxes — while Avaya Partner ACS keeps answering. You test everything on temporary numbers, and we port the real numbers only once you sign off. If anything looks wrong, the old system is still there.

See our full Avaya migration guide →

What you keep

Your phone numbersWe port every direct-dial and main line to fvoip — callers keep reaching you at the same numbers, with no gap in service.
Your extensions & menusWe rebuild the extension map, auto-attendant, ring groups, and business hours your team already knows.
Business continuityfvoip runs in parallel with the old system and cuts over only when you approve — phones never stop ringing.
Compatible SIP phonesReuse standards-based SIP desk phones where possible, or rent auto-provisioned handsets from $8.99/mo.

Other retired systems we migrate.

See all migration paths →

Frequently asked questions

Is the Avaya Partner ACS still made?

No. Avaya discontinued the Partner ACS and no longer provides full manufacturer support. Remaining parts are refurbished units from third parties.

Can I keep my Partner 18D/34D phones?

Those are proprietary analog sets and won't work on fvoip. Use them until cutover, then move to SIP desk phones (reuse compatible models or rent from $8.99/mo).

Will the switch keep my main number and extensions?

Yes. We port your numbers and rebuild your extension layout and auto-attendant so the experience is familiar on day one.

Ready for a phone system that just works?

Set up in a day. Keep your numbers. Cancel anytime — every plan is month-to-month with a 30-day money-back guarantee.

Get started with fvoip →

Time to retire Avaya Partner ACS.