The location settings allow the error-free telephone dialing at outgoing and the correct build form the recipient number for incoming UMS messages.
For more information, see "Additional Information - Location Settings - Site Settings - Creating the Call Numbers"
Enter the connection number of the outside line in the form of:
Country code ( for germany 49)
Area code (without the leading 0. For Olching, this would be 8142.)
max. internal DDI length
Determines, how many digits are considered as internal call number, this means that no outside line is needed and therefore is not dialed.
Here in the example: Fax numbers with more than 3 digits need an outside line (see screenshot).
Moreover, the sender identification (e.g. with the reception of internal calls /faxes) is changed into the international format if it the number has 5 digits or less.