... (E.X: X-Pro,X-Lite) on PC and write your sip account informations in our phones as default ... end-user, as a manager, you can decide which type right can open to your end-user! More convenience and effective ... row Dot-matix LCD display,easy operation;3.Support the calling between PC-to-PC and PC-to-Phone;4.Echo cancellation,noise ... .Clear Picture: 2 Flash Sip phone save your cost PC-to-PC, PC-to-Phone