Planet IPX-300, Internet Telephony PBX SystemLAN : 1 RJ-45 (10/100Base-TX, Auto-Sensing / Switching)WAN : 1 RJ-45 (10/100Base-TX, Auto-Sensing / Switching)Standards and ProtocolCall control : SIP 2.0 (RFC3261) , SDP (RFC 2327), Symmetric RTPRegistration : Max. 100 nodes / SIP IP phones / ATA / FXO gatewaysCalls : Max. 30 concurrent callsVoice CODEC Support : G.723, G.726, G.729, G.711, GSM, iLBCVoice Processing : DTMF detection and generationIn-Band and Out-of-Band (RFC 2833), (SIP INFO) Supports password authentication using MD5 digestPBX features : Auto Attendant (AA)Interactive Voice Response (IVR)Records IVR via IP PhoneVoicemail Support (VM) Voicemail Send to E-mailCall Detailed Record (CDR)User Management via Web BrowsersWeb Firmware UpgradeBackup and Restore Configuration fileCall / Pickup GroupDisplays 30 Registered User’s Status: Unregistered / Registered / On-CallDisplays 20 Registered Trunk’s Status: Unregistered / RegisteredFax Support using G.711 Pass-Through or T.38 Call features : Caller IDCall GroupCall HoldCall WaitingCall TransferCall Forward (Always, Busy, No Answer)Call PickupCall ParkCall ResumeMusic on HoldThree-way conference with feature phones (VIP-154T series, VIP-155PT / 350PT / 550PT and ATA series: VIP-156 / 157 / 158 / 161W)Internet SharingProtocol : TCP / IP, UDP / RTP / RTCP, HTTP, ICMP, ARP, NAT, DHCP, PPPoE, DNSAdvanced Function : NAT / Bridge mode, DHCP server, Static Route, DMZ, Virtual Server, Port Trigger, Packet / URL Filter, UPnP, DDNS,