You can add multiple Global Dialed Digits Numbers from a comma-delimited file with an extension of .txt or .csv.
Use the following format for the file:
PhoneNumber,EffectiveDate,ExpirationDate
where
PhoneNumber is a 10-digit number with no spaces or other delimiters.
EffectiveDate is in the format
YYYYMMDDExpirationDate is in the format
YYYYMMDDTo upload the file:
Under the Applications menu, select Product Management > Global Dialed Digits.
Click Upload. This opens a confirmation box. The information in the file clears existing entries in the table and adds the values from the file.
Click Yes to overwrite the entire table. This opens the Global Dialed Digits Number Upload window.
(Show picture)

Click the ellipsis button to browse the the file's location.
Click Upload.
Notes:
If any field cannot be validated, the existing entries in the Global Dialed Digits Numbers table are NOT cleared and new data is NOT uploaded. An alert describing the invalid field is displayed so you can fix the error.
The file being uploaded replaces ALL the original values in the table.