Mitel has put two of its most common small-business platforms on published sunsets. The MiVoice Office 250 (the old Mitel 5000) reached end of technical support on June 30, 2026, and MiVoice Connect (formerly ShoreTel) is being retired in stages through 2029. Mitel itself went through a financial restructuring in 2025 and came out the other side. Alamo Communications replaces Mitel systems across San Antonio, New Braunfels, and the I-35 corridor with ESI on-premise or cloud systems. This page lays out the dates as published, what they mean, and how a move goes.
Five dates. The fourth is the one that matters, and it has already passed.
Mitel's Product Discontinuance Notice for the MiVoice Office 250 is published to partners rather than on a public Mitel page; the dates above are the ones Mitel partners have relayed consistently. If you hold a Software Assurance contract, your terms may differ. Check them.
Mitel's own product page publishes one date for MiVoice Connect. Partners have relayed the rest.
We install all three, so we don't need to sell you one over the other.
Your system, in your closet, supported by the dealer who installed it. The closest shape to what an Office 250 owner has today, sized from a 50-user office to a 500-user building, with phones, desktop, and mobile kept in sync.
The same ESI phones with nothing to host on site. Mobile app, desktop softphone, video meetings, and chat come with it. Fits a business that wants to stop owning a phone system.
A separate line we carry for multi-site and distributed teams. Desk phones, mobile apps, and call routing across every location as one system.
Station list, hunt groups, the auto-attendant tree, mailboxes, and schedules come out of the Mitel before anything is touched. The new system is built from them, not from memory.
PRI, SIP, or analog, and whether the carrier has a retirement date for them. Many Mitel sites move lines and system at the same time.
Mitel phones don't carry over to ESI, but the cabling under them usually does. The survey says what's reusable before anything is quoted.
You get a written design with real costs, and the number port is filed on the carrier's timeline, which sets the cutover date.
The ESI system is programmed and tested next to the running Mitel. Nobody's phone changes until it's proven.
Scheduled around your business. The Mitel stays powered until the new system has taken a full day of calls.
Your team learns the new phones on-site. Afterward we stay your first call, backed by the manufacturer's support line.
Not today. It will keep running. What changed on June 30, 2026 is that nobody at Mitel will patch it or supply a warranty part. The forcing event is usually a failed controller or card with no source. Planning the move before that day is cheaper than planning it during.
No. Mitel completed a financial restructuring on June 20, 2025 and is operating. The question for your business is the product dates, not the company's survival.
Usually not. Mitel's desk phones are built for Mitel systems. ESI phones replace them, and the cabling they're on usually carries over.
Yes. Porting your existing numbers is part of every replacement we do, scheduled as part of the cutover so callers never hit a dead line.
It depends on seat count, sites, and the number port, which runs on the carrier's timeline. You get a dated plan at the proposal stage, and the Mitel stays live until the new system is proven.
Office 250, Mitel 5000, MiVoice Connect, or a ShoreTel that never got renamed: a local engineer will give you a straight answer on where it stands and what a move to ESI would take.
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