Yeastar S-Series VoIP PBX Configuration Basic Level - Session 7 Maintenance

How to upgrade the S-Series VoIP PBX to the latest firmware? How to make backup and restore for your S-Series PBX? This video will answer all your questions about S-Series maintenance.
--------------
Website
Yeastar Web: www.yeastar.com/
Yeastar Academy: www.yeastar.co...
Document Center: help.yeastar.com/
Support Center: support.yeasta...