In the previous blog about S-Series firmware, we introduced a number of new features such as new App Conference Panel, SLA feature, web alert, etc. We are constantly optimizing and improving our products and now the firmware version is available. This update adds new support for IP phones and fixed some bugs.

Here is an overview of the changes brought by Yeastar S-Series PBX Firmware


  • Added support for “Auto Provisioning” App version 1.2.1. The new version added support for the following phones:
    Cisco SPA301, SPA303, SPA501G, SPA502G, SPA504G, SPA508G, SPA509G, SPA512G, SPA514G, SPA525G2, CP7821
    Polycom VVX101, VVX201, VVX300, VVX310, VVX400, VVX500, VVX600, VVX601, VVX1500, IP321, IP331, IP335, IP450, IP550, IP560, IP670
    Htek UC902, UC903, UC923


  • Fixed SIM800 issue: PBX could not identify a new SIM800 module.
  • Fixed G729 Codec issue: making a call with G729 codec would cause latency.

Download the firmware or check for new update in your S-Series VoIP PBX Web interface.

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