Cisco SPA303-G2 IP Phone - Telefono ufficio VOIP 3 linee SIP Ethernet Lan Switch
• SPCP with the Cisco Unified Communications 500 Series. • SIP version 2 (RFC 3261, 3262, 3263, 3264). • SIP proxy redundancy: dynamic via DNS SRV, A records. • SIP support in NAT networks (including STUN).