Telephone,Caller ID Boxes Telephone function as following:1)FSK/DTMF dual system2)Incoming calls review and call back3)Outgoing dialed numbers review and redial4)Record 59 incoming and 16 outgoing calls5)LCD displays incoming number,date,time6)Alarm clocks7)5 step LCD controst adjustment8)IP rapid dialing function9)Ringing volume adjustment10)Handsfree speaking 11)Auto redialing and ringing ...