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  • "...I was impressed with the dedication of Mike and his staff to ensure that when employee showed up at their desks on Monday morning all they had to do was set up their voice mail and go to work."

    State of Delaware

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ESI Phone Systems

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ESI-1000 Communication Server ESI-1000

The ESI-1000 architecture allows expansion when required. Each system cabinet (one Base Cabinet and up to five Expansion Cabinets) mounts in a standard equipment rack or on the wall.


ESI-600 Communication Server ESI-600

The science behind the ESI-600 system is sophisticated, yet simple: ESI has designed a platform which can support both digital functionality and IP-to-the-desktop, in any desired combination. It's an amazingly capable all-in-one telephone system. The innovative ESI-600 design means all vital business communications features you need are built-in — not added-on.


ESI-200 Communication Server ESI-200

The ESI-200 architecture allows expansion when required. Each system cabinet (one Base Cabinet and an optional Expansion Cabinet) mounts in a standard equipment rack or on the wall.


ESI-100 ESI-100

The ESI-100 architecture allows expansion when required. The Base Cabinet and optional "piggybacking" Expansion Cabinet are wall mountable and require very little space in your phone closet.


ESI-50 ESI-50

The ESI-50L and ESI-50 Communications Servers are designed for businesses and enterprises that require the advanced features of an ESI Communications Server at a smaller company or location.

While both systems offer a wide array of features and applications, like ESI Presence Management, the key difference between the two systems is that the ESI-50 includes built-in support for IP phones, multi-site networking, automated call distribution (ACD), and multi-tenant applications. The ESI-50L, targeted at a small business with basic communications needs, can be upgraded to an ESI-50, allowing a small business to grow its system as its needs expand, while preserving its investment.

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