Brochure
Loaded with advanced capabilities yet amazingly easy to use, ESI’s patented IVX S-Class (IVX 56s) All-In-One Digital Phone System gives your small to medium-sized business the power to present your most professional side to your customers.

Big Features! Big Capacities!

IVX S-Class combines multiple first-rate, feature-rich systems into one tightly integrated unit:

  • Business phone system
  • Voice messaging choices: either full-featured voice mail/automated attendant or ESI’s Integrated Answering Machine*
  • Messages-on-hold
  • Enhanced Caller ID*
  • Optional VIP and VIP Professional communications management tools
  • Optional IVX Presence Management

IVX S-Class handles a configuration of up to 16 × 32 × 8.** And, when your business grows beyond this capacity, IVX S-Class can migrate to a larger ESI system which uses the same ESI phones, minimizing upgrade costs and retraining.


ESI’s 24-Key Feature Phone


ESI’s 48-Key Feature Phone

Powerful — but friendly!

Each IVX phone system says, “Good morning.” It teaches you how to use and program it. It reminds you to change your personal greeting after a trip. And it stands by, ready to assist you whenever you need help. There are three different models of IVX Digital Feature Phones; each is a compact, attractive addition to any desk, designed to simplify your telecommunications. Here are just two examples:

  • The display is large and easy to read.
  • The dedicated function keys (so you don’t have to memorize codes) give you more ease of use, even with the enhanced capabilities of an IVX system.

If you’re frequently on the move throughout your workplace, an ESI Digital Cordless Handset is the easiest way to stay in touch with other system extensions, not to mention your voice mail. The ESI-exclusive Quick Switch feature makes it easy to go from desktop to phone.

And each all-digital ESI phone works with either of the three principal IVX system classes (X-Class, S-Class, and E-Class), as well as the ESI-600, simplifying your migration to a larger ESI system when your business grows.

Easy to choose! Easy to use!

An IVX S-Class All-In-One Digital Phone System is an easy choice over other phone systems in its price class. Its ease of use and feature-richness reduces staff frustrations, increases productivity and enhances your corporate image. And IVX’s unique integration provides call processing efficiency and cost savings previously impossible.

* Requires Caller ID service from your telephone service provider.
** Configuration specs = 
CO (Central Office) outside lines × ESI Feature Phones × analog ports.

Call Martin Communications today at 800-521-6421!