Number of Telephony Ports: 4 Phone Interface: 4 x RJ11 FXS ports Protocol: SIP (RFC3261), IAX2 Transport Protocol: UDP, TCP, TLS, SRTP DTMF: RFC2833, SIP INFO, In-band Codec: G.711 a/u-law, G.722, G.726, G.729a, GSM, ADPCM, Speex Echo Cancellation: ITU-T G.168 LEC FAX over IP: T.38 and pass-through Signalling: Kewl Start, Loop Start Caller ID: BELL202, ETSI (V23), NTT (V23-Japan), and DTMF-based CID Disconnect Method: Busy Tone, Polarity Reversal LAN: 1 (10/100Mbps) Network: Static IP, DHCP Client, Firewall, VLAN, DDNS, QoS, OpenVPN NAT Traversal: Static NAT, STUN Size: 200 (L) mm × 137 (W) mm × 25.6 (H) mm Power Supply:12V 1.5A Operation Range: 0° to 40°C, 32° to 104° F Storage Range: -20° to 65°C, -4° to 149° F Humidity: 10-90% non-condensing | 3-way Conference Attended Transfer Black List Blind Transfer Call Detail Record (CDR) Caller ID Display or Block Call Forward: No Answer, Busy, All Call Waiting Call Status Display Do Not Disturb IP Blacklist Network Attack Alert Paging RADIUS Accounting & Login Real Open API Protocol (Based on Asterisk) Voice Prompt SIP Server and SIP Trunk supported SIP Peer Mode supported SNMP* TR-069* System Logs Web based configuration *Feature in the next release |