3.8Mute
When the Mute button is pressed during a conversation, the 
icon will be shown in the
LCD. The distant party will not hear the party on the C58/C58P, but the distant party can still be heard.
Press Mute again to return to normal conversation.
3.9Call transfer
3.9.1Blind Transfer
During a conversation, press the XFER key, dial the number to which the call is to be transferred followed by "#" and then hang up.
3.9.2Attended Transfer
During a conversation, press the XFER key, dial the number to which the call is to be transferred followed by "#" and press Send. After the third party answers, press XFER to complete the transfer.
NOTE: Call waiting and call transfer must be enabled.
NOTE: The SIP server must support RFC3515.
3.9.3Semi-Attended Transfer
During a conversation, press the XFER key, dial the number to which the call is to be transferred. Then press the Send softkey. When the third party phone begins to ring, press XFER to complete the transfer.
NOTE: Call waiting and call transfer must be enabled.
3.103-way conference call
1.Press the CONF softkey during an active call.
2.The first call will be placed on hold and dial tone will be heard.
3.Dial the number to be added to the conference.
4.Press Send.
5.When the call is answered, press CONF to add the caller to the conference.
6.To release the conference, press SPLIT.
3.11Multiple-way call
To add a fifth party to four active calls
1.Press CONF softkey or XFER softkey
2.Press OK
3.Enter the number
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