Plantronics Explorer 240 User Guide - Page 12

Headset Controls and Indicators Voice Dial Action Press and hold the Call Control button until you hear a tone. Indicator Light None Redial last number Tap the Call Control button twice. None Transfer a call from headset to phone, or from phone to headset While the call is in progress, press and hold the Call Control button until you hear a tone. None Tone Single low tone; phone may prompt with "Name please" or tones. Two brief low tones Long low tone when moving to phone; short low tone when moving to headset. 8