Call functio1. Press [ ] to answer the call. The first call isautomatically put on hold.2. Press <Swap> to switch between the calls.3. Press <Options> and select End held call to endthe call on hold.4. To end the current call, press [ ].• Voice off/Voice on: switch off the phone'smicrophone so that the other person on the phonecannot hear you, or switch it back on.• Mute keys/Send keys: switch the key tones onor off.To communicate with answering machines orcomputerised telephone systems, Send keysX680.book Page 27 Tuesday, May 16, 2006 5:03 PM