... ProtocolSIP 2.0Network ProtocolHTTP,BOOTP,FTP,TFTP,IEEE 802.1Q,*IEEE 802.1XCodec G.723.1,G.729 ... , Call Transfer, Call Holding, Call Pickup, *CallbackRedialPhone directory speed dial, Call record direct dial3-way conferenceDnD, *BlacklistVoice mail, ... adapter:AC100~240V input an DC 5V/1A outputPoE(IEEE 802.af)SpecificationStorage Temperature: 0°C ~ 60°COperating ...