Yealink expands its lineup of ip phones with a new entry level product sip t20 it features a two line display and 5 hard keys for controlling the various functions it allows users to make calls in a simple convenient and reliable manner with an excellent price performance ratio sip t20 is easy to install and inexpensive to start up it can be reliably integrated into various sip based network solutions it is ideally suited for environments in which basic business features are required