Yeastar products contain in part some open source software. Such products include: S-Series VoIP PBX, K2 IP-PBX, Yeastar VoIP Gateways, MyPBX Series IP-PBX (discontined), N412 Hybrid PBX (discontinued), and N824 Hybrid PBX (discontinued).

As part of these products, Yeastar is distributing such open source software to you under the terms of GNU General Public License. You can find the full text of this license at https://www.yeastar.com/gnu-general-public-license-version-2. The licenses allow you to freely copy, modify, and redistribute that software without any restrictions from us. You may obtain the open source codes with the above products in the table below, or you may contact Yeastar technical support at support@yeastar.com for further information.