The IP 930D with in-building mobility. Using DECT technology, these handsets and corresponding base and repeater units enables users of small to mid-side enterprises to remain connected while roaming freely through their workplace. FUNCTION KEYS Transfer Conference Redial (History) Hold.Highlights 3 lines Headset jack 12 hours talk time, 5 days standby time SPECIFICATIONS DECT / MGCP protocol 802.1 pq, DiffServ / ToS G.722, BV-32, BV-16, G.711, G.729a codecs G.711 uLaw, G.711 aLaw, G.729a codecs 802.3af PoE Class 2 (2.4 W idle / 3.2 W active / 3.9 W max) Local PoE Adapter (optional) 12 hours talk time, 5 days standby time. DISPLAY 176 x 220 pixels backlit SPEAKERPHONE Half duplex (on-screen indicator) AUDIO CONTROLS Volume (independent control) Mute (on-screen indicator) Speakerphone (on-screen indicator) Headset (on-screen indicator)