Zultys MX Release 19.0.16 – Feature List

New features and significant improvements from the official MX release notes for 19.0.16 (changes between 18.4.13 and 19.0.16).

Upgrade Requirements: The MX must be running 18.4.13. Supported on MX-SE II, MX-E, and MXvirtual. MXreport 4.3.1.163 or later is required. A trusted security certificate is required for Mobile ZAC. Web Admin now covers the majority of administrative tasks.

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New Features

Call Center / AI Capabilities

• Supervisor Contact Center Log (PE-242) – Supervisors can view transcriptions, sentiment analysis, listen to call recordings, or monitor a call in a dedicated Contact Center log. Includes robust search and filtering. See the MX Release 19 Feature Manual.
• Closed Captions (PE-240) – Real-time text captions for audio/video calls that users can turn on or off. Available for user calls, ICC call group calls, and conferences. Helpful for hearing-impaired users, noisy environments, or non-native speakers.
• Automatic Call Transcription (PE-239) – Converts audio to text for ICC call groups and conferences. Can be enabled automatically by user profile or call group. Call group transcriptions support optional sentiment analysis (positive, negative, neutral). See the MX Release 19 Feature Manual.

Voice Services

• AI Auto Attendant (PE-241) – Automated Attendant Text-to-Speech prompt generation now uses voices configured under System Settings > AI and Transcription > Text-to-Speech. By default no voices are configured. The free Zultys_Proxy service or optional cloud TTS services (Google, Deepgram, ElevenLabs, etc.) can be used. See the Release 19 Feature Manual.

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Notable Improvements

Messaging & ZAC / WebZAC

• Ability to send SMS messages to short code numbers
• WebZAC: Export greetings
• WebZAC: Open incoming fax, voicemail, and call recordings directly from the Call log
• WebZAC: Call recording and AI transcription can be enabled for a scheduled conference
• WebZAC: Mute Notification option for active conference
• Quick access to User information when in a group chat
• Calendar information can be included with conference email invitations

Voice & System

• Deleted Voicemail/Fax messages stored on the MX are now reflected in the Voice Mail and Fax Usage screen
• Improved handling of error events immediately following a firmware upgrade
• UDP ports for RTP default starting port changed to 19000
• Improved handling of SIP Diversion Header content when MX is functioning as a SIP gateway
• Hunt Group calls may not ring Mobile ZAC users (fixed)

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Important Notes
* Automated Attendant TTS requires voice configuration under System Settings > AI and Transcription (see Release 19 Feature Manual).
* MXarchive Server must be fully uninstalled and reinstalled after the MX upgrade; MXarchive Viewer must also be updated on all client machines.
* Web Admin now supports the majority of administrative and essential configuration tasks available in MX Administrator.
* ZAC Update Manager can upgrade ZAC 9.0 and later installations for users with local administrator rights.
* Always review the full official release notes and Feature Manual before upgrading.

Compiled from official Zultys MX Release Notes for version 19.0.16 (April 27, 2026).