Most businesses don't replace a phone system because they want new phones. They replace it because the manufacturer stopped supporting it, parts got scarce, or the one person who knew how to program it left. Alamo Communications has moved Central Texas businesses off aging PBXs since 2004 — onto ESI on-premise or cloud systems, keeping your numbers, with a planned cutover.
These manufacturers have ended sales, support, or both. The system may still ring today — but every year it runs past these dates, parts and programming help get harder to find.
Dates are the manufacturers' published lifecycle milestones as of September 2026. Running something not listed here — an older Grandstream, an early Avaya IP Office, a system nobody can name? Tell us the model and we'll tell you where it stands.
A phone-system replacement is a project with a plan, not a truck showing up with boxes.
We walk your building and look at what's actually on the wall — phones, lines, the closet, the cabling. Most buildings can reuse more than they expect.
ESI on-premise, ESI eCloud or NUSO cloud, or a hybrid of the two — chosen for how your team works, with real costs and no teaser pricing. Cloud vs. on-prem, compared →
Your numbers are ported, the new system is built and tested alongside the old one, and the switch is scheduled around your business — not the other way around.
Whatever the size of the system, we stay your local first call — a real engineer 30 minutes away, backed by the manufacturer's support line.
Yes. Porting your existing numbers is part of every replacement we do. The port is scheduled as part of the cutover plan, so callers never hit a dead line.
Usually not. The site survey checks what's in the walls first — most existing CAT5e and CAT6 runs carry IP phones fine. Where cabling really is the problem, we say so and quote it separately, so you can see the two decisions apart.
Often, yes. ESI's platforms have hybrid paths, so a multi-site business can move one office or department at a time while the rest keeps working on what it has. We'll tell you whether phasing makes sense for your layout or just adds cost.
It depends on seat count, number of sites, and the number port, which runs on the carrier's timeline. You get a dated plan at the proposal stage, and the old system stays live until the new one is proven.
Tell us what you're running. You'll get a straight answer from a local engineer on whether it's worth replacing — and what it would take if it is.
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