... SIP authentication (none, basic, MD5), DNS name of server,Peer to Peer/ IP callDTMF:Support SIP info, DTMF Relay ... DHCP client on WANSupport DHCP server on LANSupport main DNS and secondary DNS server.Support VLANSupport DMZSupport DNS Relay, ... /TLS, SRTP security protocolQoS with DiffServNetwork tools in telnet server: including ping, trace route, telnet clientProtocolsMAC AddressTCP:Transmission ...