Call Through User
Proceed as follows:
Using the Configuration Manager (page Functions > Call Through)
Short-code dialling number
Requirements:
Contact created for the Call Through user (e.g., mobile phone).
-Using the Configuration Manager (page User data > Address books > Contacts and assignment)
Select the Call Through user according to its display name. (Select  New to enter.)
* Note: Call Through is automatically configured for each of the four phone numbers that can be entered for each contact, but only for a total of 400 contacts.
Call restrictor/deblocker
If call restrictor and deblocker for Call Through are configured, the phone number dialled by the Call Through user is checked.
 New
Adds a new Call Through user to the list. You must then make the settings for the Call Through user.
 Delete
Deletes the entries marked in the list.