... Setting, VAD, CNGFull duplex hands-free speakerphoneSIP support SIP domain, SIP authentication (none, basic, MD5), DNS name of ... RJ9 connector)6 memory keysSupport POE Multilanguage realizes localization SIP application, support call forward/ transfer/ holding/ waiting ... Phone Book 500 recordsSupport conference and voice record on SIP serverSupport SMSNetwork FeaturesWAN/LAN: 10/100M Ethernet ports ...