GNU GPL INFORMATIONYealink VC120 video conferencing system firmware contains third-party software under the GNU General PublicLicense (GPL). Yealink uses software under the specific terms of the GPL. Please refer to the GPL for the exact terms andconditions of the license.The original GPL license, source code of components licensed under GPL and used in Yealink products can bedownloaded online:http://www.yealink.com/GPLOpenSource.aspx?BaseInfoCateId=293&NewsCateId=293&CateId=293.