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To recover your parked call:
4.7
Activate / Deactivate voice frequency
During a call, you sometimes have to send DTMF signals, for example, for a voice message service, an automatic 
switchboard or when remotely consulting an answering machine:
• access menu
• services
• services
• pick up services
•park/retrieve
You are on a call
If the parked call is not recovered within a preset time (by default 1 minute 30), it is directed to the 
operator. However, this preset time can be modified by your administrator.
• you are in conversation with one correspondent
• send mf
• to activate 
• sending dtmf signals
• de-activate mf
The function is automatically cancelled when you hang up