---
title: "VXs Release Notes"
slug: "vxs-release-notes"
updated: 2026-10-05T20:19:23Z
published: 2026-10-05T20:19:23Z
canonical: "docs.telosalliance.com/vxs-release-notes"
stale: true
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.telosalliance.com/llms.txt
> Use this file to discover all available pages before exploring further.

# VXs Release Notes

This document contains the release notes for VXs

## VXs 1.4.19

**New features**

- PTP snooping support
- SDP file upload and download
- Minor web UI improvements

**Fixes and improvements**

- Fixed an intermittent issue that could make it hard for callers to hear the host when many calls are active at the same time
- Improved stability of phone streams

**Upgrade note**

- Upgrading to this version requires manual updates to the docker-compose and configuration files. Refer to the upgrade instructions before upgrading.
- Requires active Telos Care Subscription of July 23rd 2026 or later

## VXs 1.3.1

**New features**

- The container can run as a non-root user
- AEC can be enabled or disabled through the REST API without resubmitting the full AEC configuration
- Added AEC diagnostics

**Fixes and improvements**

- Updated the base image with the latest security updates, including OpenSSL
- Clock rate and skew are reported correctly for Opus calls
- Improved LWRP handling for AES67 multi-channel inputs, including better selection between Livewire channel number and IP address
- AEC uses the correct network interface on systems with multiple NICs

## VXs 1.3.0

**New features**

- AES67 inputs with 1 to 8 channels, including channel selection
- SMPTE ST 2022-7 redundancy, including separate addresses for each path
- Opus codec support (experimental, off by default)
- Per-line outbound proxy option
- LWCP connections accepted on all network interfaces
- CLOCK_TAI reference clock (used by default for new installs)
- Can run in a container limited to specific CPUs (cpuset)
- Environment variables to change the default web UI and call_control HTTP/HTTPS ports
- Configuration option to relax scheduling latency requirements
- Faster synchronization across CPU cores

**Fixes and improvements**

- Fixed a startup issue when the host is configured with IPv6 DNS servers
- Fixed missing audio when the codec is switched mid-call
- Fixed AES67 packet timestamps
- Fixed buffer overruns that repeated continuously after the first one
- Improved buffering for AEC inputs and for input streams with short packets
- Fixed the RTP payload type, sequence numbers, and timestamps of DTMF packets
- Improved stability of the DSP engine
- Fixed on-premises Key9 licensing
- Licensed feature counts stay correct when the license server is slow to respond
- SMPTE ST 2022-7:
  - Streams keep sending if one redundant interface goes down
  - Livewire advertises all addresses for 2022-7 streams
  - Stream output addresses must be unique
  - Extra stream addresses are ignored on systems with a single interface
- Fixed the web UI for call processing settings
- Fixed the XML API and configuration backup/restore, including XML import in the web UI and AoIP interface settings
- Receive buffer sizes take scheduling latency into account
- Fixed clock jumps after processing overruns
- Removed redundant log messages when the clock resynchronizes
- Improved Opus call stability
- Updated the base image with the latest security updates

## VXs 1.0.0

- Initial release