Planet Ethernet VoIP Phone (2*RJ45) - SIP PLT-VIP-254T Planet VIP-254T, Ethernet VoIP Phone (2*RJ45) - SIP, SIP 2.0 (RFC3261), MD5 for SIP authentication, (RFC2069 RFC 2617), SIP outbound proxy, SIP NAT Traversal Support STUN (RFC3489), Caller ID, 3-Way conference, Immediate (unconditional) call forwarding, Busy call forwarding, No answer calls forwarding Call Hold Waiting Transfer