ESI Phone Systems

ESI VoIP and Digital Phone Systems

VoIP & Digital Business Phone System

Action Communication Technology has been leading the charge in letting the business community know about the outstanding innovations available on the award-winning ESI phone system. The ESI phone system has been well recognized by telecommunications industry leaders and awarded multiple kudos for the advances made to its product line of ESI telephone systems and peripherals. The ESI telephone system comes complete with extremely user-friendly ESI telephones.

For information and to request quotes for the 12, 24, 48 and IP telephones, see ESI Telephone Sets...

ESI (Estech Systems, Inc.) designs, manufactures and markets advanced, highly featured business communications systems. Progressive vision, leading-edge technology, legendary reliability and award-winning products define ESI. Since its inception in 1987, ESI — a privately held corporation based in Plano, Texas — has shipped over 200,000 systems, and has enjoyed remarkable growth and uninterrupted profitability.

Why ESI? Watch this outstanding INSTANT video!!

ESI Systems & Products

ESI Phone Systems Products & for Business

All ESI phone systems deliver inventive and practical functions such as live call recording, live call screening, and the Verbal User Guide™. Beyond those similarities lie some differences:
ESI-CS-1000 Phone System - 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.
Total stations - 816
IP stations - 816
Digital stations - 504
Analog stations - 384
Call-processing ports - 1,128
Central Office (CO) lines - 240
Digital line cards (T1/PRI) - 10
Voice mail ports - 128
Voice storage (hours) - 1,200
ESI CS 600 Phone System The ESI-600 architecture allows expansion when required. Each system cabinet (one Base Cabinet and up to three Expansion Cabinets) mounts in a standard equipment rack or on the wall.
Total stations - 408
IP stations - 408
Digital stations - 336
Analog stations - 188
Call-processing ports - 624
Central Office (CO) lines - 168
Digital line cards (T1/PRI) - 6
Voice mail ports - 32
Voice storage (hours) - 1,200
ESI CS 200 Phone System The ESI-200 architecture allows expansion when required. Each system cabinet (one Base Cabinet and up to three Expansion Cabinets) mounts in a standard equipment rack or on the wall.
Total stations - 192
IP stations - 192
Digital stations - 168
Analog stations - 56
Call-processing ports - 300
Central Office (CO) lines - 84
Digital line cards (T1/PRI) - 3
Voice mail ports - Up to 24
Voice storage (hours) - Up to 600

ESI CS 100 Phone System - 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.
Total stations - 84
IP stations - 72
Digital stations - 48
Analog stations - 28
Call-processing ports - 108
Central Office (CO) lines - 42
Digital line cards (T1/PRI) - 1
Voice mail ports - 8
Voice storage (hours) - Up to 140

ESI IVX S-Class Phone System (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. 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.


ESI IVX C-Class ESI builds big-system features into the small-business IVX C-Class. The patented IVX phone system design means all the vital business communications features are built-in — not added-on. Equipped to handle up to six phone lines, 12 digital stations and two analog stations for fax machines or cordless phones, IVX C-Class gives your business a competitive edge.


ESI IP 200e Phone System offers the Remote IP Feature Phone which can be installed just about anywhere. So, whether you’re operating a field office or working out of the one you live in, ESI’s The IP 200e gives you all of the great features of your office’s IP-enabled ESI phone system anywhere you have a suitable broadband connection to the office phone system; the Remote IP Feature Phone does the rest.

ESI-Link uses your WAN or the Internet to join together up to 100 compatible ESI phone systems into one interconnected, IP-based system. While ESI wasn’t the first company to offer a multi-site solution, it was the first to offer one that unites the many advantages of multi-site communications (see full details) with the unique, high-performance features of ESI phone systems.

ESI Presence Managementis a hardware and software solution incorporating an innovative combination of RF scanning technology and ESI’s award-winning telephone systems. ESI Presence Management is offered as a basic doorphone solution for addressing basic entry and exit applications, and as an advanced supervisory solution utilizing RFID technology to provide access control and personnel location. Optional ESI TimeLine™ PC software maximizes the value of this amazing product.


ESI Cordless Handset uses proven, reliable 900 MHz technology to provide mobility to the user who’s constantly on the move in the office. (Why 900 MHz? Because it passes through walls far more effectively than cordless telephony using the 2.4 GHz and 5.8 GHz bands, which are intended more for residential than workplace use.) You get the same rich ESI feature set as in the 24-Key Feature Phone — but in a compact, lightweight, portable handset. The ESI-exclusive Quick Switch feature makes going from your desktop ESI phone to your Cordless Handset, or back again, as easy as pressing a key.


ESI VIP (Visually Integrated Phone), you combine the power of your ESI phone system and Microsoft Outlook to enhance communication in your day-to-day activities — including the ability to control calls and organize voice mail and contacts.



ESI VIP Professional VIP comes in two “flavors”: the basic VIP and VIP Professional. Each configuration is licensed independently, with easy migration from VIP to VIP Professional.



ESI PC Attendant Console Handling an active office’s phone traffic is an incredibly demanding task, particularly for an attendant who has other duties as well. That’s why we’ve created ESI PC Attendant Console. Built on the incredibly full-featured VIP Professional software platform, ESI PC Attendant Console is ready to give even the busiest attendant the tools to handle call traffic and help keep the office running smoothly

Installation Services

System Installation, Programming & Training

Whether you have a Nortel Nortsar, BCM or ESI Telephone system we have the expertise to help you. If you are relocating and need your system moved call us we can have you up and running with out missing a call! Need installation? We install business phone systems...