D.2.1 Configuration of the ISDN Trunk Group and Trunks
In SwyxServer the ISDN trunk group and the trunks must be appropriately configured for the access to the superior system.
How to configure the ISDN trunk group and trunks to the superior system
1 Create an ISDN trunk group ( This is how you create an ISDN trunk group).
2 In the context menu, select "Properties".
3 On the "Profile" tab, select the profile "Internal Lines".
The number format is set according to the default setting.
4 The public line access of the PBX is the digit or sequence of digits that must be dialed within the main telecommunication system to gain access to an external line. Ask the main telecommunication system administrator about this.
5 If other number ranges are used in the range of the sub-PBX, configure the number replacement accordingly.
6 On the "Forwarding" tab, you can specify which calls from Swyx are forwarded to the parent system.
7 On the "Rights" tab, you can specify the rights associated with calls made from this system to Swyx.
8 Select the location of the sub-PBX on the "Location" tab.
9 End the configuration of the ISDN trunk group with "OK".
10 Next, set up one or more ISDN trunks belonging to this trunk group. You can allow only incoming or only outgoings calls for these, for example.
 
Please make sure that the numbers assigned to users fall within the range you have configured for Swyx in the main PBX system. This should especially be checked when new numbers are allocated by the administrator.