8212 DECT Handset - SIP User manual 
3.12 Three-way conference with internal and/or external contacts 
(conference) 
You are in communication with the first caller and the second is on hold. 
 
•  Open the contextual menu. 
End the conference with all participants.  
•  The conference has ended.  
3.13 Sending DTMF signals 
Sending DTMF is subject to configuration. Contact your administrator to check that the feature is 
enabled. 
During a conversation you sometimes have to send DTMF signals, such as with a voice server, an 
automated attendant or a remotely consulted answering machine. 
•  You are in conversation with one contact. 
•  Open the contextual menu. 
Use the same procedure to deactivate DTMF mode. The function is automatically cancelled when you 
hang up. 
To activate or deactivate DTMF mode: 
•  Open the contextual menu. 
3.14 Locking your telephone  
This feature locks the keypad.