Grandstream GAC2500 Android Enterprise Conference Phone

Protocols: SIP RFC3261, TCP/IPUDP, RTP/RTCP, HTTP/HTTPS, ARP, ICMP, DNS (A record, SRV, NAPTR), DHCP, PPPoE, SSH, TFTP, NTP, STUN, SIMPLE, LLDP, LDAP, TR-069, 802.1x, TLS, SRTP, IPV6, OpenVPN (pending)