Section 700 - Operation Chapter 5. Key Telephone Features576-36-700 DBS 576 (USA) issued October 2000 5-57• Both the called and calling parties must belong to an Extension Class of Service (COS) thatallows Voice Calling.Handsfree OperationDescriptionHandsfree Operation allows you to use all available System features without lifting the handset. Anyspeakerphone can be operated handsfree.OperationTo initiate Handsfree Operation:Hardware Requirements• N/ARelated Programming• N/AConsiderations• N/AHeadset OperationDescriptionHeadset Operation allows you to handle calls with a headset instead of with the handset orspeakerphone.Action Result1. Press the ON/OFF key. Phone is offhook with access to full rangeof calling features