This procedure provides the basic steps for configuring a SIP trunk between two IP Office systems.
Before you begin
You must know the IP address of both ends of the trunk.
You must have valid licenses on both IP Office systems.
On Server Edition, make sure you have a non-zero value in the SIP Trunk Sessions field on the License | Remote Server tab. If you do not, you will see Monitor messages about insufficient licenses.
Procedure
In the Manager navigation pane, right click Line and select New > SIP Line.
Record the Line Number value that appears on the SIP Line page for use later.
In the ITSP Domain Name field, enter the domain name required by the far end. If nothing is configured in this field, then IP Office inserts the far end's ITSP Proxy Address from the Transport tab as the ITSP domain in the SIP messaging.
Use the default values for the remaining fields.
Select the Transport tab.
In the ITSP Proxy Address field, enter the IP Address of the far end.
Select the SIP URI tab.
Click Add.
Enter values for the Incoming Group and Outgoing Group fields. You can use the Line Number from the SIP Line tab for both values.
In the Manager navigation page, select Incoming Call Route.
On the Standard tab, in the Line Group ID field, enter the Line Number from the SIP Line tab.
Select the Destinations tab.
In the Destination column, replace the value with a period (“.”).
In the Manager navigation pane, select Short Code.
Add a short code to dial the trunk you have just added.
One end of the trunk is now configured. Save the configuration to the IP Office.
Using Manager, open the configuration for the IP Office at the other end of the SIP trunk and repeat the steps.
