... WiFi ,802.11b/g), 1*SIM slot ,PPPoE/ADSL,NAT ,VOIP Ethernet Interface:1-2 *10/100Base-T;Calling Control Protocol ... MAXConfiguration:Web, KeyboardUpgrade Online:Support TFTP upgradeDisplay:LCD display,display 16 Telephone Number, Clock, back lightCase:12 Dialing Keyback light,12 ... of customer purview. HIP1860(3) IP Phone SIP PHONE connect with Voip gateway