Yealink IP phones are affordable, powerful alternatives to other common phones. Yealink phones operate using Session Initiation Protocol (SIP) and are ideal for users using a highly inter-operable phone system such as Asterisk or PIAF. Yealink IP phones can also be added to hosted cloud services. These phones come with several great features such as Gigabit Ethernet switches, a touch screen, and large color display. All of our Yealink phones include a one year warranty.