Product features

• Number of GSM channels (Max): 4 (Quad-Band GSM/GPRS850/900/1800/1900MHz; Support external antenna)
• Protocol: SIP (RFC3261), IAX2
• Transport: UDP,TCP,TLS,SRTP
• DTMF: RFC2833, SIP INFO, In-band
• Codec: G.711 A/u-law, G.726, G.729 A, GSM, Speex.
• LAN: 1 (10/100MBps)
• Network: Static IP, DHCP Client, Firewall, VLAN, DDNS, QoS, OpenVPN
• Power Supply: AC 100-240V 50/60Hz 1.5A MAX
• Size: 340x210x44mm