Business Telephone Systems
Your telephone system is the front door to your business and is quite possibly the most important piece of your business. In today's world your phone system is what brings your customers to you and you to them. For over 28 years, businesses in Oklahoma and across the nation have been trusting Diverse CTI with their communications. Our consultative approach allows us to assist businesses of any size and industry and our experience gives us unparalleled insight. Explore below some of our product offerings and talk to us about how we can help your business!


As the absolute most state of the art system we offer, the EdgeLink system is a custom communications platform that offers the best blend of affordability, powerful technology, and incredible flexibility. It's highly configurable platform is able to suite the needs of almost any business size. Nothing on the market is more advanced or powerful than then EDGELINK Communications Server.

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ESI builds products that smoothly install, are easy to understand, and simple to use. All ESI products are designed with combined proprietary hardware and software platforms. ESI proudly designs and engineers its systems’ hardware and software in the United States. ESI’s all-in-one phone systems (ESI Communications Servers and IVX) deliver advanced operating performance through seamless feature integration. 





A very experienced telecommunications manufacture, Avaya produces cutting edge telecommunications solutions that range from small business to the enterprise level. From small key systems to managed services and IP Telephony, Avaya’s suite of business communications solutions can handle it all.Avaya is a global leader in enterprise communications systems. The company provides unified communications, contact centers and related services directly and through its channel partners to leading businesses and organizations around the world. Enterprises of all sizes depend on Avaya for state-of-the-art communications that improve efficiency, collaboration, customer service and competitiveness.

Avaya’s unique combination of communications applications, software and services helps companies simplify complex communications and integrate with technologies from other vendors, enabling customers to unlock value and potential from their network. By embedding communications into the business processes of an enterprise, Avaya helps improve the way organizations work - making people more productive, processes more intelligent and customers more satisfied. Learn more...

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Business Telephone Systems

Networking and IT Services

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Would you like more information on choosing a phone system? Check out an article by one of our experts!

More about us!
Diverse CTI is based in Oklahoma City so you know you have a local company to conduct business with. Not only that, but we have the values to back the relationship. Our goal is a long term partnership that yields strong results with a foundation of trust built over time. Diverse CTI is a company you can have confidence in. We are in it for the long haul! Learn More...