In TMS 13.x, perform the following actions:
Login to TMS
Go to Phone Books > Manage Phone Book Sources
In the middle of the screen select "New"
Give it an appropriate name
In the Type field, select the dropdown and choose "File Based Phone Book"
Be sure the radio button is selected for "Use Local File or File from URL"
Click, "Browse Files" in the "File Path"
A pop-up window will appear requesting where the file is located. ***txt and csv are the only support formats
Select your file and Upload.
- Scott