Physical Interfaces
• Phone Interfaces: 4FXS and 4FXO, RJ-11
• Ethernet Interfaces: 4*RJ-45 10/100Base-Tx, RJ-45
Voice & Fax
• Protocol: SIPv2, SDP, RTP (RFC2833)
• Codecs: G.711A/U law, G.723.1, G.729A/B
• Echo Cancellation: G.168 with up to 128ms
• FAX: T.38, Pass-through
• DTMF: Signal, RFC2833, INBAND
• NAT Traversal: STUN, Dynamic/Static NAT
• QoS: VLAN 802.1P/Q, DIFFServ ToS
FXO Port 
• Dialing Modes: Pulse and DTMF
• Pulse Dialing: 10 and 20 PPS
• Caller ID: DTMF, Bellcore Type 1&2, ETSI, BT, NTT
• Busy Tone/No Current Detection, Polarity Reversal Detection
• Lifeline: Power/Network Failure Lifeline
FXS Port
• Dialing Modes: Pulse and DTMF
• Caller ID: DTMF and FSK Presentation
• Hook Flash: Local or Relay processing
• Polarity Reversal: for Call Connect/Disconnection Signaling
Supplement Services
• Call Waiting, Call Transfer (Blind transfer, Attendant Transfer), Call Forwarding, Hotline, Call Hold, Do-not-disturb
Power Supply
• Input: 12VDC 2A, Power Adapter
• Power Consumption (Typical): 20W
Other
• Dimension: 242(L)*152(W)*40(H) mm
• Weight: 1.0KG
• Temperature (Operation):-10 ℃~ 45 ℃
                    (Storage): -20 ℃~80 ℃
• Humidity: 10%-90% Non-condensation
Homologation
• CE, FCC