This document is a user guide for ESI Communications Servers and ESI phones, covering current and legacy ESI phone models. ESI is a company that designs and manufactures high-performance phone systems with advanced technology and user-friendly features.
This document serves as a user's guide for ESI Communications Servers, providing instructions on how to use supported phone models effectively. It covers current models such as the ESI 60 Business Phone (digital and IP versions), ESI 40 Business Phone, 48-Key Feature Phone, and ESI Cordless Handset II, as well as legacy products like the 24-Key and 12-Key Feature Phones.
Each of these phone models can support up to two optional Expansion Consoles.
Using the optional Expansion Consoles allows for a possible total of 120 additional programmable feature keys.
You must hold down a programmable feature key for at least two seconds to perform direct programming.