IP PBX Programmer, Yeastar, Grandstream, and Zyxel. Connect Yealink phones to a Yeastar PBX, and enjoy connecting all your branches to one PBX. Alternatively, connect your mobile phone, tablet, or computer to a Yeastar PBX and enjoy all PBX services on your mobile phone or computer. Contact via WhatsApp (The mobile number appears when you press the contact button).