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           Statement on the Open Source Software of Yealink IP Phones



         
        Yealink IP Phone products utilize some software from the open source community. Therefore, you must obtain the licenses according to the specific license terms applicable to the software. The following table lists the license information of the open source software used by Yealink T3X, T4XU, and T5XW IP phone series, for reference only. Yealink will provide the source code and license of the open source software as you need.
         
        Open Source SoftwareVersionLicenseLink
        Mtd-Utils GPLv2http://git.infradead.org/mtd-utils.git
        Linux Kernel4.9.75GPLv2https://git.kernel.org/
        OpenVPN2.4.9GPLv2https://openvpn.net/
        LibPcap4.1.3BSDhttps://github.com/patmarion/winpcap/tree/master/
        IpTable1.4.2GPLv2https://www.netfilter.org/pub/iptables/
        BusyBox1.10.3GPLv2https://www.busybox.net/downloads/
        C-Ares-Dns1.9.1MIThttps://c-ares.org/download/
        Curl7.77.0MIThttps://github.com/curl/curl/archive/master.zip
        OpenLDAP2.4.46GNU, GPLhttps://git.openldap.org/jotik/openldap/-/tags/OPENLDAP_REL_ENG_2_4_46
        OpenSSL1.1.1gApachehttps://www.openssl.org/source/old/1.0.2/openssl-1.0.2n.tar.gz
        PJSIP2.3GPLv2https://github.com/pjsip/pjproject/releases/tag/2.3
        SRTP2.3.0GPLhttps://github.com/cisco/libsrtp/releases/tag/v2.3.0
        libusb1.0.23the GNU Lesser General
        Public License        		https://github.com/libusb/libusb/archive/master.zip
        libhid0.8.0-rc1GNU General Public Licensehttps://github.com/libusb/hidapi/archive/master.zip
        Wap_Supplicant2.9GPLv2https://www.linuxfromscratch.org/blfs/view/8.1/basicnet/wpa_supplicant.html
        libwebsockets3.2MIThttps://github.com/warmcat/libwebsockets
        expat2.1.0MIThttps://sourceforge.net/projects/expat/files/expat/2.1.0/
        libstrophe0.8MIT, GPLv3https://github.com/strophe/libstrophe
        thrift0.10.0Apachehttps://downloads.apache.org/thrift/0.10.0/
        rapidjson1.1.0MIThttps://github.com/Tencent/rapidjson
        pugixml1.2MIThttps://source.openmpt.org/svn/openmpt/tags/1.23.05.00/include/pugixml/docs/quickstart.html
        dnsmasq2.85GPLV2https://thekelleys.org.uk/dnsmasq/
        pppd2.4.3BSDhttps://github.com/ppp-project/ppp
        xl2tpd1.3.15GPLV2https://github.com/xelerance/xl2tpd/
        freetype2.10.1FTLhttps://www.freetype.org/
        libjpeg Custom free software licensehttps://sourceforge.net/projects/libjpeg/reviews
        libpng1.6.34Zlib licensehttp://www.libpng.org/pub/png/libpng.html
        mtdev MIT (X11) Licensehttp://bitmath.org/code/mtdev/



         
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