In S-Series VoIP PBX there is a feature called “Extension Group”. We could custom the extension group by adding the extensions you want to this group and name it.
Here’s how to configure the extension group:
1. Go to Settings → PBX → Extension Group, click “Add” in the extension list page.
2. Create an extension group, input the name of the group and choose the extensions to the selected box.
3. After creating the extension group, you could choose the extension group into the selected box on the extension edit page instead of choosing extensions one by one. For example, when you create a queue, you could select an extension group.