ESI IVX X-Class Business Phone System

Handles your communications needs— now and for years to come.

With up to 256 communications ports, IVX X-Class is among the most capable of ESI’s IVX family of advanced business telecommunications systems. Most businesses will find the expandable IVX X-Class serves their communications needs well into the future.

IVX X-Class includes voice mail, an automated attendant, and automatic call distribution (ACD). It also supports ESI’s VIP enhancement for Microsoft® Outlook® as well as advanced voice over IP (VoIP) communication and ESI Presence Management. Two IVX X-Class systems are available: IVX 128x and IVX 256x. Its many features make IVX X-Class an attractive choice for a wide variety of organizations.


System highlights (maximum capacities shown IVX 256X)


IVX X-ClassTotal stations – 168
Analog stations – 56
IP Phones – 12
Central Office (CO) lines – 84
Digital line cards (T1/PRI) – 1
Voice mail ports – 24
Voice storage (hours) – Up to 420
Station/special-purpose mailboxes – 1,121
Conference ports – 6
Built-in automatic call distribution (ACD) – Yes
Shared-office tenanting (tenants) – 2
ESI Presence Management – Optional
VIP applications – Optional

ESI X-Class Brochure Adobe PDF Brochure

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ESI offers additional ways to run your business more smoothly.

Any ESI system by itself is an outstanding addition to your business, but special options
like these will make it still more valuable to you.

  • ESI Presence Management combines RF scanning technology and ESI’s award-winning telephone systems to offer presence status, call control, entrance security, and  documented tracking of users’ work hours and attendance history. For complete time and attendance management, use it with ESI TimeLine PC software.
  • VIP (Visually Integrated Phone) works within Microsoft® Outlook® to help you manage your ESI voice mail and contacts from your PC. VIP Professional adds still more features, such as auto-recording§, text-messaging, and color-coded monitoring of station status.
  • VIP PC Attendant Console greatly simplifies managing any busy office’s call traffic. Everything your attendant needs to handle your callers efficiently is just a mouse-click away.
  • VIP ACD Supervisor provides a variety of tools for better managing the unique needs of an ACD department, including a view of real-time department performance and agent status, and built-in management reports as well as the ability to create custom reports. To enhance your employees’ teamwork, VIP ACD Agent provides one-click access to fellow agents’ status.