eSIP Evolution Series™

eSIP E-Series (1)



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Power your on-premises work environment with solutions that can boost productivity and efficiency while having the ability to expand when needed. On-Premises solutions provide great security for your organization from any unexpected threats with advanced encryption technology.


Premium Power, Flexibility, Performance & Security

Step into the future of on-premises communication with our e-Series servers for the ESI eSIP Evolution Series™, designed to cater to enterprises with up to 500 users. In today's fast-paced tech landscape, staying ahead of the curve is key to staying competitive. That's why savvy companies are realizing the importance of upgrading beyond traditional PBX systems. What they're after is more than just a communication tool; they want a trusted partner—a solution that's not only secure and reliable but also adaptable to their unique needs. With the muscle of the e-Series powering your eSIP Evolution Series™ deployment, your business will experience a seamless blend of desktop phones, mobile apps, and PC softphones—all working together effortlessly to support your distributed workforce. 

A robust set of advanced features that promote user productivity will help any organization deliver an amazing customer experience. The companion eMobile™ smartphone application and eMobile for Desktop™ PC-softphone make it easy for remote users to stay connected and available no matter where they work, while the PC-based call control application makes managing multiple calls easy and efficient. Additionally, the eMobile Pro™ server securely encrypts voice traffic from remote endpoints, to ensure stronger connections for users outside of the physical office.

Advanced plug-and-play capabilities and comprehensive auto-provisioning make this solution faster to deploy than many competitive on-premises systems. Enhanced disaster recovery options, built-in security, an internal firewall, and monitoring and threat detection make this a secure and reliable solution for any organization’s communications.

In business, time is valuable. Let the ESI eSIP Evolution Series™ raise your business to a new level with mobility, security and reliability to power your communications for years to come.



Scalable & Flexible

Whether your employees work in the office or at a remote site, your solution can grow along with your distributed workforce. Now your employees can have access to the same tools regardless of their office locations, or if calling on a desktop phone, mobile app, or softphone, all efficiently installed by an ESI Certified Partner.


Secure Communications

With eMobile Pro™, rest assured that your conversations are shielded and secure. Calls travel through an encrypted end-to-end tunnel, safeguarding them from bandwidth-heavy resources and potential threats. This ensures crystal-clear conversations, forging robust connections on both ends of the call.


Powerful Features 

Designed with an array of top-tier features, the e-Series optimizes user productivity and efficiency. From unified voice, video, to collaboration tools, mundane tasks become effortless. Explore features like visual voicemail, dial-by-name, conferencing, advanced call handling, call recording, and more!

Enterprise Plan

Calling & Telephony Features:

  • Audio Conferencing
  • Boss-Secretary Routing
  • Call Management Controls
    • Forward, Hold, Mute, Park/Pick-up, and Blind/Attended Transfers
  • Call Monitoring
    • Listen, Whisper, & Barge-in
  • Call Routing (by CID, DID)
  • Call Queues
  • Call Waiting
  • Caller ID (CID)
  • Cascade Mailbox
  • Call Detail Reports (CDR)
  • Call Recording
  • Click-to-Call Chrome Extension
  • Contacts Management
  • Dial-by-Name Directory
  • Direct Business Phone Number (DID)
  • Do Not Disturb Mode (DND)
  • Intercom
  • LED Status Support (BLF)
    • Available/Idle = Green
    • Busy/Unavailable = Red
    • Do Not Disturb = Amber
  • Omni-channel Messaging
  • Recording Tone Control
  • Ring Groups
  • Ringtone Options
  • Smartphone App (Android & iOS)
  • Softphone/WebRTC Audio Calling App
  • Speed Dial
  • Voicemail
    • Voicemail to Email
    • Personal Voicemail Greetings



Call Center Features

  • ACD Queuing
    • Ring All, Linear, Priority, Rotating, Random, and Workload-based
  • Agent & Supervisor Tools
  • Automatic Routing
    • Time-based or Choice-based with IVR
  • Browser-based Queue Panel
  • Call Monitoring & Recording
  • Caller Wait Times (Estimated & In-Queue)
  • Customizable Widgets
  • Drag-and-Drop Call Handling
  • Email Alerts (Optional)
  • Performance Measurement SLAs
  • Real-time & Historical Reports
    • Agent Activities
      • Login, Missed, Paused
    • Customer Satisfaction
    • Queue Averages
  • Queue Performance
  • Ring Groups
  • Role-based Features
  • Satisfaction & Post-Call Surveys
  • Self-Service Prompts
  • Switchboard-style Queues
  • Wallboard Metrics & Support



Business Features

  • Auto Provisioning
  • Call Allow/Block List
  • DISA 
  • DNIS
  • Emergency Numbers & Notifications
  • Fax-to-Email and T.38 Fax Support
  • FQDN (supplied by ESI)
  • Hot Desking
  • Interactive Voice Response (IVR) with Custom Prompts
  • Integrations
    • Active Directory (Azure)
    • CRM/PM Solutions
    • Help Desk Solutions
  • Music-on-Hold & Playlist Support
  • PIN List
  • Mobile & Remote Extensions
  • Scheduling Business Hours & Holidays
  • Smartphone App (iOS & Android)
  • Softphone App (Windows & MacOS) 
  • Web Client



Security & Admin Tools

  • Auto Provisioning
  • Backup & Restore
  • Bulk Import & Export
    • Contacts, Extensions, Routes, and Trunks
  • eMobile Pro™ Secure Calling
  • Event Logs
  • Event Notifications
  • Extension Groups
  • Network Drive
  • Operation Logs
  • Operator Panel
    • Manage Unlimited Users
    • Dispatch Call Controls
    • Monitor Call Status
    • Presence Status
    • Switch Business Hours
  • Secure Encryption (TLS/SRTP)
  • Web Access to System Settings (Admins)
  • Security Tools
    • Auto & Defense
    • IP Blocklist (Global)
    • IPv6
    • Password Enforcement
    • Security Alerts via Email
    • SNMPv3 Support
  • SMTP Server (Built-in)
  • Two-Factor Authentication
  • Troubleshooting
  • User Roles (Granular)
  • Web-based GUI Dashboard




Add the ULTIMATE PLAN for Video and more!

Ultimate Plan Features:

  • Microsoft Active Directory Integration
  • Softphone/WebRTC Video Calling
    • 1:1 Web Video Calling
    • HD Video & Audio
    • Shrinkable Window
    • Video/Audio Switch
  • Video Conferencing
    • Bulk/Instant Link Invitations
    • HD Video & Audio
    • In-meeting Team Chat
    • Screen Sharing
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Smartphone App
ESI eMobile™ helps you stay available for clients in or out of the office from your smartphone while using your business number.
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PC Softphone
ESI eMobile for Desktop™ lets users make, receive and handle calls on a PC from anywhere with an internet connection.
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SMS Campaigns (A2P)
Use text messaging to create convenient two-way customer conversations, reminders and marketing campaigns.



There are two powerful deployment options for the ESI eSIP Evolution Series to make sure you get the perfect fit for your business.

The standard deployment option installs the solution at your facility and connects to your existing dial tone service. In this scenario, the customer buys the solution up-front.

The "Winning Combination" option (also known as the eSIP-as-a-Service) replaces existing expensive dial tone service with ESI SIP Trunks, adding Cloud-based telephony that unlocks powerful new features and benefits for the solution. In this scenario, the customer pays on a monthly basis  - plus they could also get a free ESI system!

When you connect SIP trunks to your eSIP solution, you can get advanced features and benefits like:

  • Significant savings on your monthly phone bills
  • Unlimited calling in North America (some restrictions apply)
  • Advanced system health monitoring
  • Enhanced fail-over with Auto Attendant
  • Video conferencing and screen sharing
  • and more!

Take advantage of the winning combination of SIP Trunks and the ESI eSIP Evolution Series™ solution!