Grandstream IP Phone - Corded - Corded/Cordless - Wi-Fi, Bluetooth - 16 x Total Line - VoIP - IEEE 802.11a/b/g/n/ac - Speakerphone - 2 x Network (RJ-45) - USB - PoE Ports - SIP, TCP, UDP, RTP, RTCP, ARP, ICMP, DHCP, PPPoE, SSH, NTP, ... Protocol(s):