Yeastar P-Series Appliance Edition 37.22.0.138 V23.3

Release date:April 15, 2026

Release version:V23.3-GA

This topic introduces the improvements included in the second GA release of firmware 37.22.0.139.

To try out the new updates, check for firmware updates from PBX admin portal or download the firmware from Yeastar Official Website , and upgrade your phone system.
For details on the new features and improvements in Linkus UC Clients and 'Yeastar Linkus for Google' Chrome extension, see Linkus Release Notes.
If you found something that doesn't work as expected, you can submit feedback directly from here.

This firmware version has officially transitioned from Beta to General Availability (GA) and is now ready for production use.

Along with the promotion to GA, this version includes robust security updates and essential bug fixes:

Security: Enhanced overall system protection based on recent internal security review results.
Important: Immediate upgrade is strongly recommended for more comprehensive security protection.
Call: Fixed the call issue: If an extension user's Linkus Mobile Client had been killed before the PBX was upgraded to the version 37.22.0.134-beta1, the user could not receive push notifications for incoming calls until manually relaunching the Linkus Mobile Client.