The plantronics audio 1100m usb handset eases the transition to unified communications designed for phone intensive users not yet ready to manage calls on the pc the usb handset provides a familiar 10 key dial pad and traditional call control buttons such as answerend and mute the ergonomic audio 1100m is optimised for microsoftreg office communicator 2007 the touch of a button lets users switch to an alternate speaker phone or the pc microphone speakers when desired wideband audio an