4-8 Conference callTo talk privately to one of the conference callparticipants:Å Press Conference commands.Ç Select a participant from the list of partici-pants and press One to one.The conference call is now split into twocalls: the one-to-one call is the active calland the conference is on hold.Once you have finished the private conversa-tion, you can add the person back into theconference call by pressing Conference call.Voice call transferThe voice call transfer is a network service thatenables you to connect two voice calls togetherand disconnect yourself from both calls.Note: The transfer operation can be made only if:1. You have one call on hold.2. You have one call active.3. All calls are voice calls (fax or data callscannot be transferred).4. None of the calls is a conference call.There are two ways to transfer voice calls fromthe phone interface:1. Press 4 followed by .or2. Press and hold the Menu key for a second.Choose the Transfer option in the menu andpress OK, or press Quit to cancel.To transfer from the communicator interface:Å When you have one call on hold and anothercall active, press Call commands.Ç Choose the option Transfer call and press OK.Alternating callsDuring an alternating call, you may change themode of the call from voice to fax. Alternatingcalls can be made to a fax mailbox, for example:you initiate the call as a voice call, but it changesinto a fax call when your fax mailbox starts tosend you your faxes.To make alternating calls you need to add a spe-cial Tel/Fax field to the contact cards of the ser-vices of your alternating calls (see Chapter 3"Contacts: Contact cards - Customizing contactcards" on page 3-3).You can also change a voice call into a fax call bypressing Change mode. Alternating calls cannotbe put on hold or incorporated into a conferencecall.Sending DTMF tonesThe Dual Tone Multi Frequency (DTMF) tones al-low you to communicate with voice mailboxes,computerized telephony systems, etc.You can use the digits 0 - 9, as well as thecharacters p, w, * and # (for information on thefunctions of these characters, see Chapter 3"Contacts: Contact cards - Storing DTMF tones"on page 3-4).To send a DTMF sequence when you have anactive call:1. Press the digits at the top of the communica-tor interface keyboard. Each keystroke willgenerate a DTMF tone which will be trans-mitted directly.or2. Press Send DTMF. A list of stored DTMF se-quences is shown (for information on how tostore DTMF sequences, see Chapter 3 "Con-tacts: Contact cards - Storing DTMF tones"on page 3-4).