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