Interference-free telephony- 100+ hours standby time- SIP RFC 3261 Compliant- Media Encryption SRTP- Encrypted SIP signaling TLS/SIPS- Caller Picture- Address Book Direct export from Outlook as VCARD .vcf- Address Book lookup for incoming calls- LDAP- Dial plans- DECT Intercom- Auto Connect- Speed Dialing- Mailbox VM- Call Hold- Call Transfer Blind Transfer- Call Waiting Indication- Call Bridge Attended Transfer- 3-Party Conferencing- Call Forwarding- Do not Disturb- CLIP/CLIR- RSS Feed Reader XML based Internet content- Native Microsoft Lync 2010 Support- Microsoft Lync Presence- Action URLs- Simultaneous Ringing- STUN Support- IPv6- IEEE 802.1X- Auto Configuration and FW Update