Call target
External number | Module | Port/Account
The available connections.
Call Through number
External phone number, that the Call Through user must dial to call the PBX for Call Through.
DDI
Direct Dial In, that the Call Through user must dial to call the PBX for Call Through.
Max. Quantity
Specifies how many how many simultaneous Call Through calls are permitted for the exchange line.
---: No Call Through calls are permitted.