... .168, and Hands-free can support 96ms, Hand free Speaker Phone Support Voice Gain Setting, VAD, CNG DTMF:Support SIP info, DTMF ... SIP domain, SIP authentication (none, basic, MD5), Peer to Peer/ IP call Call control features: Flexible dial map, Hotline, Empty callingn ... for xDSL Support DHCP Client on WAN Support VLAN (optional: voice vlan/data vlan) QOS with DiffSer Support main DNS and ...