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