A SIP trunking device can be a PSTN gateway or similar device that does not issue REGISTER messages. Calls are forwarded to the device based on dial plan rules.
If VLANS are enabled, the SIP trunking device must have the same VLAN as defined on the VoIP ALG home page. Refer to Use VoIP ALG Settings. If internal FXO ports are available (on appropriate platforms) and enabled, they act as a default device unless configured otherwise.
- Choose VoIP > SIP > ALG.
Scroll to SIP Trunking Devices.
Configure settings using the information in the following table as a guide.
Click Commit to save your settings.
To delete SIP trunking devices In the SIP Trunking Devices table:
Select checkboxes for the entries that you want to delete. Click All to choose all the entries or None to clear your selections.
Click Delete to remove an entry.
Click OK to confirm.
Proceed to Configure Header Transformation.