The latest model IP phones from Panasonic are the KX-NT500 series phones and the prior line is the KX-NT300 series IP phones.
Please keep in mind, all of the Panasonic IP Phones require some type of power supply. The power supplies can be a POE injector, a standard power supply that plugs into the wall, or a POE switch.
Most all of the Panasonic IP phones include a LAN port and a PC port. The LAN port is the connection to your network hardware, the PC port connects to the Ethernet port on yu computer.