Configuring System Settings : Configuring voice : Configuring system capacity
  
Configuring system capacity
The System > Voice > Capacity tab lets you set the number of currently connected calls allowed on the FortiVoice unit, configure voicemail greeting and message length, and configure CDR settings.
To configure system capacity
1. Go to System > Voice > Capacity.
2. Under Concurrent Calls, enter the outbound and inbound concurrent call limits you want.
3. Under Voicemail, enter the maximum message and greeting length you want.
4. Under CDR, enter the time in month that you want to keep the call log/call detail record and the maximum number of CDR records. For information about call log/CDR, see “Viewing call records”.
5. Click Apply.
See also 
Configuring voice
Configuring SIP settings
Configuring SIP phone auto-provisioning
Adding prompt languages
Managing phone configurations