Support SIP PUBLISH method (RFC 3903), SIP
Presence package (RFC 3856, 3863) for use of
MFKs, SIP Dialog package (RFC 4235)
Support for SIP MESSAGE method (RFC 3428)
Display
Graphic LCD display, up to 4 level grayscale
Feature Keys
HOLD, TRANSFER, CONF, LINE 1, LINE 2, MSG,
SPEAKERPHONE, HANDSET, HEADSET,
MUTE/DND, NAVIGATION(5), VOLUME, 3 XML
Programmable Soft keys
Device
Management
NAT-friendly remote software upgrade (via
TFTP/HTTP) for deployed devices including behind
firewall/NAT
Auto/manual provisioning system, Web GUI Interface
Support Layer 2 (802.1Q, VLAN, 802.1p) and Layer 3
QoS (ToS, DiffServ, MPLS)
Audio Features
Full-duplex hands-free speakerphone
Advanced Digital Signal Processing (DSP)
Dynamic negotiation of codec and voice payload
length
Support for G.723,1 (5.3/6.3K), G.729A/B, G.711 a/µ-
law, G.726-32, G.722 (wide-band), and iLBC codecs
In-band and out-of-band DTMF (in audio, RFC2833,
SIP INFO)
Silence Suppression, VAD (voice activity detection),
CNG (comfort noise generation), ANG (automatic
gain control)
Acoustic Echo Cancellation (AEC) with Acoustic Gain
Control (AGC) for speakerphone mode, support side
tone
Adaptive jitter buffer control (patent-pending) and
packet delay and loss concealment
HD audio handset with HD wideband audio codecs
for excellent double-talk performance
Telephony
Features
Intuitive graphic user interface (GUI), downloadable
phone book (XML, LDAP), support for anonymous
call using privacy header, MLS (multi language
support)
Voice mail indicator, downloadable custom ring-
tones, call hold, call transfer (attended/blind), call
forward, call waiting, caller ID, mute, redial, call log,
caller ID display or block, Do-Not-Disturb (DND) and
volume control
