Turbine 9.6 - Release notes

• Previous Release - Turbine 9.5 - Release notes

This document provides the release notes for VSF-Turbine 9.6 with incremental bug fix releases. The release notes describe new features, improvements and issues fixed after VSF-Turbine 9.5.3.1.

VSF-Turbine (vsft) is a firmware for Zenitel devices based on the IMX28 processor.

Release info

Name: VSF-Turbine
Description: VSF-Turbine is a firmware for Zenitel devices based on the IMX28 processor.

The firmware is delivered in two different ZIP archives and one swu file:

• vsft-9.6.x.x - Used for standard in-field upgrades
• vsft-prod-9.6.x.x - Used in production- and recovery upgrades

Version: vsft-9.6.3.1
Date: 11.11.2026
Status: General Availability

VSF-TURBINE 9.6.3.1

Improvements

DS-1993 DNS SRV Support and Transport Selection for SIP

Manual DNS SRV record configuration (sip_srv_record_name) has been removed in favor of standard DNS SRV/NAPTR discovery using the configured Server Domain. When the outbound transport is set to ANY, proxy port is automatically resolved (set to 0 / Auto).

• Action required: Users upgrading stations with custom manual SRV records must configure the target domain in the standard Server Domain.

DS-1253 Support for Cisco Webex integration has been added

Zenitel devices running in SIP mode can now register and operate with Cisco Webex Calling. Leveraging RFC-3263 DNS SRV discovery and TLS/SRTP encryption, stations can participate in calls with Webex soft clients, external PSTN lines, and other registered intercoms.

DS-1910 Deprecation Notice for Legacy ENA Amplifiers

VS-IS 9.6.3.0 is the last supported firmware release for ENA2100-AC (Item No. 1023102100) and ENA2200 (Item No. 1023102200).

DS-1879 Acoustic Tuning & Echo Suppression Improvements

Updated acoustic filter profiles for TMIS station to minimize resonance, suppress echo artifacts, and deliver clearer speech intelligibility during open-duplex calls.

DS-1875 Acoustic Tuning & Echo Suppression Improvements

Updated acoustic filter profiles for VR3G-1 and VR3G-1P stations to minimize resonance, suppress echo artifacts, and deliver clearer speech intelligibility during open-duplex calls.

DS-1872 IPVRS Improved audio frequency response on Mic and Loudspeaker signals

Audio tuning updates have been introduced on the IPVRS to improve speech intelligibility, reduce distortion, and enhance audio switching performance. These improvements deliver a clearer, more natural voice experience in both half-duplex and open-duplex communication.

DS-1671 Acoustic Self-Test Support for IPHDT Handset Stations

Added automated audio tone testing for IPHDT handset stations. The test verifies acoustic integrity between the earpiece and handset microphone, running strictly when the handset is cradled and the station is idle.

Fixed issues

DS-1992 Fixed TCIS compact-v2 stations lost their v2 devicetree after a TFTP upgrade

Upgrading a Turbine Compact station with the v2 front board over TFTP installed the devicetree for the original Compact hardware instead of the v2 one. After the reboot the station identified itself as a plain Compact and no longer used the v2 display setup. Later automatic upgrades kept the wrong devicetree.

This release corrects the devicetree selection, so v2 stations keep their v2 devicetree through upgrades.

DS-1985 Corrected Maximum Output Volume on IPVRS Stations

Resolved an issue where maximum loudspeaker output on IPVRS stations was lower than specified. The volume range has been corrected to deliver full acoustic output for both standard voice calls and volume override announcements.

DS-1905 Multitone tone test robustness adjustments

Adjusted thresholds for tone FFT bin magnitude feedback from speaker to mic to reduce false negatives in moderate to high noise.

DS-1901 Security Update

Resolved vulnerabilities related to: CVE-2026-95377 OS command injection via DHCP provisioning.

• Action: Upgrade to 9.6.3.0 or later for SIP, IC-Edge and ICX-Alphacom, and 10.1.3.0 or later for Zenitel Connect.