- 89 - Automatically select calling line, if one line can’t be connected, the phonecan automatically switch to other line to call. 9 kinds of ring types and 3 user-defined music rings DTMF Relay: support SIP info, DTMF Relay, RFC2833 SIP application: SIP Call forward/transfer(blind/attended)/hold/waiting/3way talking/SMS/pickup /join call /redial /unredial/multiline/intercom/BLF/presence/push to talk/auto redial/call return Call control features: Flexible dial map, hotline, empty calling No. rejectservice, black list for reject authenticated call, white list, limit call, nodisturb, caller ID, CLIR(reject the anonymous call), CLIP(make a call withanonymous), Dial without register. Support phonebook 500 records, Incoming calls / outgoing calls / missedcalls. Each supports 300 records. Support IAX2 4 DSS keys Soft keys programmable, function keys programmable Code synchronization via IP PBX/IMS Support click to dial via web phone book/Group listening Voice codec setting for each SIP line Support keypad lock, and emergency call during the keypad lock Customized lcd logo Ring play via headset or speaker setting Signal tone parameters customized Phonebook supports vcard standard 12/24 hours’ time display Support daylight saving time Support path, group Support SIP Privacy Support SMS Support MWI Support Speed dial Support XML9.1.3 Network features WAN/LAN: support bridge and router model Support PPPoE for xDSL Support basic NAT and NAPT Support VLAN (optional: voice vlan/ data vlan) NAT Penetrate, Stun Penetrate Support DMZ Support VPN (L2TP/OPEN VPN) function