Download Center
Access official user manuals, firmware, software tools, and configuration guides for IP PBX, VoIP phones, and IT hardware at the CESGULF download center.
Grandstream Resource Center
Firmware is updated regularly to patch vulnerabilities and improve stability. Installing legacy (older) versions exposes your device to security risks. Grandstream strongly recommends deploying the latest available firmware to protect your device with the newest security patches and performance optimizations.
Yeastar Resource Center
Datasheets, brochures, ebooks, tools, customer stories, videos, and more.
Maximize your potential with Yeastar! Explore our help center for
comprehensive step-by-step tutorials and extensive reference materials.
You can download an executable file of the latest firmware for Yeastar Products, and upload the file in the Web interface to upgrade. More details about the upgrade can be found in Firmware Upgrade Guide below. For version details, please read the release notes.
Latest Yeastar products support automatic upgrade. To upgrade automatically, check for new firmware in the Configuration Panel of PBX directly. And you can set how often to check for updates automatically and whether to automatically install.
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