> For the complete documentation index, see [llms.txt](https://support.portsip.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://support.portsip.com/portsip-communications-solution/portsip-pbx-administration-guide/summary-of-changes.md).

# Summary of Changes

PortSIP PBX is available in the following versions:

* **v22.x – Current and Recommended Version**\
  This is the latest release and is strongly recommended for all new deployments and existing systems.
* **v16.x – Maintenance Mode**\
  This version is in maintenance mode and will reach **End of Life (EOL) at the end of 2026**.
* **v12.x – End of Life (EOL)**\
  This version is no longer supported and should not be used in production environments.

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### Recommendation

We strongly recommend that customers deploy and operate the **latest v22.x version** of PortSIP PBX.\
Using the most recent version ensures access to modern features, improved performance, enhanced security, and ongoing support, helping to maximize system reliability and user productivity.

***

### Release Notes

For detailed information about changes and updates in each version, refer to the following release notes:

* [v22.x Release Notes](/portsip-communications-solution/portsip-pbx-administration-guide/summary-of-changes/v22.x-release-notes.md)
* [v16.x Release Notes](/portsip-communications-solution/portsip-pbx-administration-guide/summary-of-changes/v16.x-release-notes.md)