Power
Supports IEEE 802.3af Power over Ethernet (built-in) with an optional external universal AC power supply kit (100-240V, 0.4A, 48V/19W).
Display
248 x 68 pixels with white LED backlight and adjustable intensity.
Keypad
Standard 12-key keypad with 4 context-dependent soft keys, on-hook/off-hook, redial, mute, volume controls, 5-way navigation, and menu access.
Audio Features
Loudspeaker frequency: 250–7,000 Hz, volume adjustable up to 84 dB at 0.5 meters. Includes voice activity detection, comfort noise fill, DTMF tone generation, low-delay packet transmission, adaptive jitter buffers, packet loss concealment, acoustic echo cancellation, and background noise suppression. Supports codecs G.711 (A-law and μ-law), G.729a, G.722, and iLBC.
Call Handling Features
Includes shared call/bridged line appearance, Busy Lamp Field (BLF), call waiting, call transfer, hold, divert, pickup, three-way conferencing, one-touch speed dial and redial, remote missed call notification, automatic off-hook placement, do not disturb, call timer, and detailed call info.
Other Features
Feature-rich GUI, time/date display, corporate directory access, customizable call progress tones, volume adjustment keys, user-configurable contact directory and call history, and WAV file support for tones.
Network and Provisioning
Ethernet 10/100 Base-T, DHCP/static IP, SNTP time sync, centralized provisioning via FTP/TFTP/HTTP/HTTPS, QoS support (IEEE 802.1p/Q VLAN tagging, Layer 3 TOS/DSCP), NAT support, RTCP, event logging, local dial plan, diagnostics, status, statistics, selectable ringer tones, and field upgradeable.
Security
TLS support, encrypted config files, digest authentication, password login, HTTPS provisioning, signed software executables, and URL syntax with password support for boot server.
Protocol Support
Compliant with IETF SIP (RFC 3261 and related RFCs).
Optional AC Power Kit Includes
Universal power supply, 7-foot region-specific power cord, and power insertion cable.
Environmental Conditions
Operating temperature: 5–40°C (41–104°F), relative humidity 20–85% (non-condensing), storage temperature -30–55°C (-22–131°F).
