VSF-Fortitude8 9.4 Release Notes
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This document provides the release notes for VSF-Fortitude8 9.3 with incremental bug fix releases. The release notes for VSF-Fortitude8 9.4 describe new features, improvements and issues fixed after VSF-Fortitude8 9.3.3.1.
Release info
Name: VSF-Fortitude8
Description: VSF-Fortitude8 is a firmware for Zenitel devices based on the IMX8 processor.
The firmware is delivered in two different files:
- vsff8-9.4.3.x - Used for standard in-field upgrades
- vsff8-prod-9.4.3.x - Used in production- and recovery upgrades.
Version: 9.4.3.9
Date: 30.01.2026
Status: General Availability
VSF-FORTITUDE8 9.4.3.0
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-1585 Far-End Signal Squelch configuration changes needed reboot to apply
Now Squelch parameters are applied on the-fly when saving changes.
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-1259 In the Hostname field the maximum number of characters is increased to 64
DS-769 STUN support for intercom devices
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.
Issues fixed
MTN-4796 ONVIF Subscribe Enhancements
Subscription requests now accept any namespace in the Address field.
The “wsnt:Filter” element is now optional. If omitted, the subscription will include all topics by default.
MTN-4777 The speaker volume is now functioning correctly and retains its settings following a device reboot.
MTN-4759 Added lua-sec module to the software image, enabling scripts to use SSL functions.
MTN-4757 The keypad backlight on TEIV-1+ will now be on during the ringing and calling state
MTN-4742 ONVIF Improvement: Default Video Source Configuration
GetVideoSourceConfigurationOptions now returns a default video source configuration even when no configuration is specified.
MTN-4688 Fixed issues with ONVIF backchannel RTSP failures on missing media
Now always creating full media pipeline for backchannel to ensure better compatibility.
MTN-4681 Ringing tone in ICX/AlphaCom now depends on setting in AlphaPro
Ringing tone level in ICX/Alphacom mode was low and did not respond to the Ringing Volume setting configured in AlphaPro. This is now fixed, ringing tone level is higher and dependent on value set in AlphaPro.
MTN-4566 Removed Partial Reboot Option
The Partial Reboot option has been removed from the device web recovery page.
Audio will no longer be interrupted or stopped when unrelated configuration change, such as adjusting the volume, are made.
MTN-3887 FPS label on video devices is now shown as Target FPS
The frame rate setting reflects the intended or target frames per second. However, the actual FPS may vary depending on factors such as encoding conditions, stream configuration, available bandwidth, and image complexity (e.g., high motion or low light scenes). This value is not guaranteed to be constant.
DS-1572 Audio Setup Real-Time challenges
Observed on Connect case call to queue four duplicated SDP in short time interval causing up two 4 start and stop on one setup. This optimization deprecates memory intensive AEC context save and restore by keeping state in code-object between calls. Also added state handling on new Audio Session separating network audio and audio engine initialize in different steps.
DS-1571 Duplicated SDPs from SIP-Invite/Re-Invite causes multiple audio start/stop with possible side effects
Observed on Connect case call to queue four duplicated SDP in short time interval causing up two 4 start and stop on one setup. This optimization check for duplicated SDPs in Re-Invites and do nothing if repeated with same parameters.
DS-1527 Zenitel Connect – Increased Virtual DAK Entry Limit
Fixed an issue where Virtual DAKs were limited to a maximum of 9 entries. Attempting to configure more than 9 entries caused configuration scrambling and an effective cap at 10 entries. The limit has now been lifted to support a larger number of entries reliably.
DS-1502 Multicast paging could stop working under some rare conditions
Multicast paging would stop working under some rare conditions, this is now fixed.
Known Issues
MTN-4333 HD-Audio mode not working using digital microphone input
Audio is distorted when digital microphone is used. Audio is OK if using analogue microphone input