Communications Servers

There are five ESI Communications Server models — the ESI-1000, the ESI-200, the ESI-100, and the ESI-50 — which share a vast array of features and user benefits. They vary chiefly according to their call-handling, message storage, and other capacities.

Note: Additionally, the entry-level ESI-50L has some of these features and, if your business requires more, may be upgraded to an ESI-50. Below, each item marked with a red • is a feature which the ESI-50L either supports only partially or not at all. In general, the ESI-50L doesn’t support features that depend on ACD, VoIP, or high-bandwidth lines.

The capacities described below are maximums, which will depend on the specific ESI Communications Server model and extension dialing plan (four-digit • or three-digit) which your Certified ESI Installer helps you select.

  • Fully flexible platform
      Gone are the days when you had to choose between digital and IP, and hope you’d made the right call. An ESI Communications Server’s tremendously flexible architecture can be configured for all-IP, all-digital, or whatever combination of the two your business needs. And, as your business changes, so can the configuration of your ESI Communications Server.
  • Scalability
      Each ESI Communications Server is built to grow with your business — intelligently. And, thanks to the shared feature set among the ESI Communications Server line, retraining is minimized if you migrate from one model up to the next. You can start small and grow as large as you’re likely to need — up to 336 outside lines and up to 816 stations. Additionally, there’s can support for up to 10 T1 or PRI high-bandwidth lines.
  • Powerful voice mail capabilities
      The integrated voice mail system includes up to 32 always-available channels and includes ESI’s exclusive Quick Groups™, Quick Move™, and Virtual Mailbox Key features. Your ESI Reseller can also provide ESI’s innovative VIP family of Windows-based communications management tools.
  • Extensive phone options
    • ESI Digital Feature Phone — 12-Key, 24-Key, and 48-Key. Backlit displays available on 24-Key and 48-Key Digital Feature Phones.
    • ESI 48-Key IP Feature Phone II • — Connects via LAN, WAN, or Internet; provides full ESI feature set via IP, either locally or at remote location; uses industry-standard G.711 and G.726 compression to reduce bandwidth requirements. Backlit display available on 48-Key IP Feature Phone II.
    • ESI Cordless Handset — Two sizes each of three models: Digital, [local] IP •, and Remote IP •; IP models allow Power over Ethernet (PoE) or AC power for your maximum convenience.
    • Standard analog sets.
  • Advanced phone features
      Some examples include ESI’s enhanced Caller ID, live call recording and screening, ACD, Esi-Dex™ speed-dialing, built-in message-on-hold, and Verbal User Guide.
  • Esi-Link (multi-site) support
      Multiple ESI business phone systems can be interconnected across an enterprise’s dedicated WAN, creating virtually seamless connectivity among multiple offices. While some competing systems are unable to provide more than bare-bones phone features in such arrangements, Esi-Linked distant extensions operate as though they were local, providing one-button and abbreviated dialing, simplified call transfer, multi-system hold, conference calling, and message sharing.
  • Remote connection capability
      With the rapid growth of broadband services like DSL and fiber-optical, IP Feature Phones II can be deployed to small remote locations such as local sub-offices or teleworkers’ home desktops.

Click here to download a detailed brochure about ESI Communications Servers.
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