PBX Yeastar S20 and SRTP

Hello! I own a PBX Yeastar S20 (FW 30.15.0.115), which was officially imported into Russia. For all devices imported into the territory of Russia and the countries of the Customs Union support SRTP is turned off. Please tell me if I can change the firmware or some other way, for example via the SSH console to enable support for SRTP? If possible, how to do it?