Audio : OPUS Codec, G.711a / u, G.722, G.726A, G.729, G.729A, G.729AB, Call Handling : Supports AST-SIP* for enhanced features and, integration, Native support with IP Office, Single line phone, supports two concurrent calls, Mute Key with Mute Alerting, Recent Call Log (100 entries) / Aura Contact List (250 entries), Transfer, Hold, Park / Unpark, Conferencing, TLS / SRTP for encryption, Handset has built-in volume boost for Hearing Impaired, Dual 10 / 100 Ethernet ports to support co-located PC, RJ45 connector, Wi-Fi® : Optional – J100 Wireless Module, Languages : English, French, German, Italian, Spanish, Brazilian-Portuguese, Russian, Korean, Hebrew, Dutch, Polish, Turkish and Simplified Chinese

Color display—2.8 inches x 2.1 inches (7.0 cm x 5.3 cm)—Diagonal width: 3.5 inches (8.8 cm), 8 buttons with dual LEDs (red, green), 4 softkeys, Hard buttons for phone, messages, contacts, history, home, navigation cluster, headset, speaker, volume, mute, LEDs for speaker, mute, headset, message, history, 24 administrative buttons, Wideband audio in handset and headset, Full duplex speakerphone, Gigabit Ethernet (10 / 100 / 1000) line interface, Second Ethernet interface 10 / 100 / 1000 Mbps, PoE Class (IEEE 802.3af) registers as class 1 device and supports 802.3az