Providing easy of access to multiple extensions, connecting to both On-Premises and Cloud VoIP services
ESI ePhone X-1™ is the perfect addition to any business requiring a simple way to manage high call volumes. Featuring a built-in sidecar supporting up to 106 programmable feature keys with the ability to adapt to different work settings without compromising productivity.
Features and Specs
Overview
Call Features
Phone Features
Audio
Networking
Protocols
Deployment & Maintenance
Physical Specifications
Compatible Systems

ESI eCloud PBX
The ESI eCloud PBX delivers a smarter approach to business communications, making it easy to communicate anywhere, anytime, from any device.

ESI eSIP Evolution Series
The all-new ESI eSIP Evolution Series™ delivers power, performance, flexibility and scalability for small to mid-sized enterprises up to 500 users.