VoIP SIP SPA112 ATA, 2 x FXS ports, 1 x LAN Ethernet Port (10/100 Mbps). Connect analog telephones or fax machines to a VoIP service provider, provides high-quality, clear-sounding voice, using advanced voice quality-of-service (QoS). SIPv2 (RFC 3261, 3262, 3263, and 3264), SRTP, G.711 (a and u law), G.726, G.729 A, Dynamic Payload, DTMF in-band and out-of-band (RFC 2833). Fax tone detection pass-through, Fax pass-through using G.711, Real-time fax over IP using T.38 fax relay (T.38 support is dependent on fax machine and network and transport resilience)
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