ESI Systems

 

Overview

There are five ESI Communications Server models — the ESI-1000, the ESI-600, 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.

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.

 

Certifications

System features

Voice mail features

Auto attendant features

Station features

Programmable feature keys

The programmable feature keys can be programmed as follows:

Analog extension ports

Up to 384 analog extensions can be programmed, based on the number of cards installed in the system. The ports can be defined as: