Does the Avaya IP Office 500 Cost Too Much to Upgrade to Preferred Edition

Avaya IP Office Preferred Edition Upgrade: Is It Worth It?

What the upgrade really involves, and when a cloud phone system makes more sense.

Updated October 2026

Many businesses running Avaya IP Office on Essential Edition ask us the same question: should we upgrade to Preferred Edition so our staff can work remotely? We have looked at this for our own customers, and here is our honest answer.

What Essential Edition Does Well

Essential Edition is the base license for IP Office. It handles everyday office calling, auto attendant, hunt groups, and basic voicemail on Avaya desk phones. For an office where most people work on-site, it is reliable and inexpensive to keep running. See our look at what it costs to maintain Essential Edition.

What Preferred Edition Adds

Preferred Edition is an add-on license that sits on top of Essential Edition. It unlocks Voicemail Pro and the user licenses that give staff remote and mobile features, such as softphones and mobile apps that work as their office extension.

What a Preferred Edition Upgrade Involves

The Preferred license by itself is only part of the picture. A typical upgrade for remote work includes:

• Upgrade and Preferred Edition licenses
• Additional voicemail port licenses if you need more than the 4 included
• A user license for each remote employee (for softphone and mobile app use)
• A Windows or Linux server, or an IP Office UC module, to run Voicemail Pro
• Programming and testing, often one to two days of work
• Phones or headsets for remote staff
• Ongoing Avaya and TTI maintenance

Added together, that is a significant investment in an on-premise system, for features that now come standard with most cloud phone systems.

Our Honest Recommendation

For most small and mid-sized businesses, upgrading to Preferred Edition is not the best use of the money. It usually comes down to one of two paths:

If Essential Edition works for your office, keep it.

Your system can keep running for years at a low cost. Pairing it with TTI SIP 500 trunks can also help lower your monthly phone line costs.

If you need remote work and modern features, move to TTI's Cloud Phone System instead of upgrading.

Rather than paying to upgrade an on-premise system, invest in a platform built for how people work today: mobile and desktop apps, call recording, call reports, a web portal, and Microsoft Teams integration, for staff in the office or at home. Learn more about TTI's Cloud Phone System.

How TTI Helps

TTI has worked with Avaya phone systems for over 20 years, and we also host our own Cloud Phone System. That means we can give you a straight answer either way. We handle the installation, staff training, number porting, and ongoing support, locally in NJ, PA, and NY.

Not sure which path fits? We will review your current system and show you your options at no cost.

Call 856-235-1411Request a Free System Review