Description
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Number of GSM channels (Max): 16 (Quad-Band GSM/GPRS850/900/1800/1900MHz; Support external antenna)
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Protocol: SIP (RFC3261), IAX2
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Transport: UDP,TCP,TLS,SRTP
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DTMF: RFC2833, SIP INFO, In-band
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Codec: G.711 A/u-law, G.726, G.729 A, GSM, Speex.
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LAN: 1 (10/100MBps)
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Network: Static IP, DHCP Client, Firewall, VLAN, DDNS, QoS, OpenVPN
