OmniSound® Full duplex broadband sound technology  Management of up to 4 external participants  Recording range up to 30 m² room area or 10 participants  Simultaneous management of internal and external telephone listings (LDAP)  Connection type for add-on microphones for a larger recording range.  Microsoft Office Communication server 2007 R2 ready  Multiple SIP registrations  Broadband quality by G.722  Security: OpenVPN SIPS/SRTP, TLS SIP RFC3261 NAT: STUN, ICE