VSF-Fortitude6 9.4 Release Notes

• Previous Release - VSF-Fortitude6 9.3 Release Notes

This document provides the release notes for VSF-Fortitude6 9.4 with incremental bug fix releases. The release notes for VSF-Fortitude6 9.3 describe new features, improvements and issues fixed after VSF-Fortitude6 9.3.3.1.

Release info

Name: VSF-Fortitude6
Description: VSF-Fortitude6 is a firmware for Zenitel devices based on the IMX6 processor.

The firmware is delivered in two different files:

• vsff6-9.4.3.x - Used for standard in-field upgrades
• vsff6-prod-9.4.3.x - Used in production- and recovery upgrades.

Version: 9.4.3.1
Date: 30.01.2026
Status: General Availability

VSF-FORTITUDE6 9.4.3.1

Improvements

DS-1638 The default Acoustic Echo Cancellation (AEC) profile is tuned for better double-talk and voice quality.

The default AEC filter configuration is set to do less processing of the audio signal for best voice switching, double-talk and voice quality. When installed in challenging environments using high volume settings, the AEC level might have to be set to Moderate or High to remove echo return.

DS-1516 Relays/outputs can now be triggered by multicast paging streams

The activation is following the audio stream priorities in the multicast paging.

DS-769 STUN support for intercom devices (Tech preview)

Basic STUN support is added for intercom for peer to peer RTP media between two intercoms that communicate over public PBX.

When STUN is configured to communicate on local network hairpin rules are required on router.

Fixed Issues

MTN-4820 The Volume settings in the web interface accepted input values outside the defined maximum/minimum range.

Volume settings now only accepts input values within the defined maximum/minimum range.

MTN-4709 Fixed an issue where logo upload failed for filenames over 50 characters

Previously, uploading a logo file with a filename longer than 50 characters would fail silently, resulting in a broken image link in the browser. Deleting the missing logo could cause the device to reboot. This issue has been resolved: uploads with filenames exceeding 50 characters are now blocked with an error message, preventing broken images and device crashes.

DS-1568 Fixed an issue where second Permanent Audio Stream (PAS) would not start

The PAS stream 2 under special config page zForm_stream_config should now stream as expected.