You can import a list of extension ranges to an existing extension range list.
Before you begin
Fill in the range start, range end, CM name, extension type, and routing setting details for each range. Save the spreadsheet file on your computer in .csv format.
Procedure
From System Admin, go to Phone Numbers > Extension Ranges.
System Admin displays the list of existing extension ranges.
Click Import.
Click Choose File, browse the spreadsheet file on your computer, and click Open.
Optional Modify Bulk Request Name.
Click Next.
System Admin displays the status of the files uploaded.
