• Headset support
• Two lines management
• DTMF inband through voice or RFC 2833, and outbound (through SIP INFO method)
• Automatic provisioning, software upgrades and phone configuration through TFTP/FTP server
• Configuration through the phone menu or through integrated web browser interface

Main Calling Features

• On-hook dialing, pre-dialing and off-hook dialing
• Calling number and name display
• Message waiting indication
• Call waiting
• Call hold
• Enquiry call
• Call transfer (atteneded transfer and blind transfer)
• Call forwarding unconditional, call forwarding on no answer and on busy
• Do not disturb
• Reject
• Redial
• Mute
• Four speed dial keys configurable

Proxy Capabilities

• Proxy server registration
• Back to back user agent (B2B UA)
• Inbound/outbound proxy server
• Proxy redirect server compatible

Dial Plan Capabilities

• CLIP-display of the calling line number and name

Codecs

• Multiple/simple codecs management
• G.711u, G.711a
• G.729ab
• G.723.1
• Voice Activity Detection and Comfort Noise Generation (RFC 3389)

SIP Stack Compliance

• SIP stack compliant with RFC 3261: MD5 authentication

Protocols

• SIP
• TCP/IP
• DNS
• DHCP
• TFTP
• FTP
• UDP
• TCP
• SNTP
• SNMP
• RTP
• RTCP
• HTTP
• Telnet