Voicemail-/Fax Box
Proceed as follows:
Separately for profiles
Using the Configuration Manager
Profile-related (page Groups > Profiles > Configuration > Configure)
PROFILE CONFIGURATION 
Select the profile you want to display/configure.
Function-related (page Groups > Profiles > Function overview)
Configure
Opens the configuration of the single function for all profiles.
Profile-controlled settings
The profile setting overrides the group setting.
* Note: When switched off, the setting under Groups > Properties applies.
Voice mailbox | Call acceptance type
immediately
The voice mailbox will be called immediately.
on no reply
The voice mailbox will be called after expiration of the entered delay time.
on busy
The voice mailbox will be called if the internal number of the group is busy and if no call forwarding on busy has been enabled for the group.
on no reply + on busy
The voice mailbox will be called if the group does not reply or if the internal number of the group is busy.
on all logged out
The voice mailbox will be called when all group members are logged out.
Delay time for CF on no reply
Call acceptance during the time entered here.