Fortinet FortiGate Voice 4.0 MR1 ユーザーズマニュアル

Dial plans route calls made from a FortiGate Voice extension to an external phone system. 
The external phone system can be one or more PSTN lines if your FortiGate Voice unit 
includes PSTN interfaces, or a VoIP service provider. To route calls to an external phone 
system you add dial plan rules that define the extra digits that extension users must dial to 
call out of the PBX. The rules also control how the FortiGate Voice unit handles these calls 
including whether to block or allow the call, the destinations the calls are routed to and 
whether to add digits to the beginning of the dialed number (called prepending).
For example, if PBX users should be able to dial 911 for emergencies you should include 
a dial plan rule that sends all calls that begin with 911 to an external phone system. This 
rule should also override the default outgoing prefix so that users can dial 911 without 
having to dial 9 first. 
You can also use dial plan rules to block some calls. For example, if you want to block 
extensions from making international calls you can add dial plan rule that blocks calls that 
start with the default outgoing prefix followed by 011.
When the FortiGate Voice unit receives a call from an extension that does not match the 
FortiGate Voice unit’s extension range, the call is processed according to the dial plan 
added to the extension. (If the extension does not have a dial plan the call is blocked). To 
process the call, the FortiGate Voice unit selects the dial plan rule that best matches the 
dialed numbers and processes the call using the settings in the dial plan rule. For 
example, the emergency dial plan rule could route calls out a local PSTN line (if your 
FortiGate Voice unit includes them) or to a remote VoIP provider.

No Answer Action Select the action to take when there is no answer for the incoming caller. You 

can select Voicemail, which routes the caller to voicemail, IVR, or Hangup. If 

you select Voicemail, the Voicemail Extension list appears and you need to 

select the voicemail extension number. 

Select the voicemail extension number from the drop-down list. This option 

appears only when Voicemail is selected in No Answer Action. 

Select an extension in the Available column and then use the -> arrow to 

move it to the Selected column. 
To remove an extension from the Selected column, select the extension and 

use the <- arrow to move it back to the Available column.