... Headset interface 3.Supporting the POE and AC adapter power supply IP Phone 1. Product Features:l Clear voiceTelepower ... center applications. l Supporting the POE and AC adapter power supplyl Support Auto-provision/http/tftp for upgrade software ... 9 Level Volume AdjustmentCall Processing Call Waiting, Call Queuing,Call Forward, Call Transfer, Call Holding, Call Pickup, *CallbackRedialPhone directory ...