To setup a Number go to Configuration > TRACK Pulse tab > Numbers. Once you have purchased or synced your numbers from Twilio your phone numbers will appear on this page.
To update a phone number, click on the Update button. Once on the Update Numbers screen, fill out the following fields:
Record ID: TRACK ID for this phone number. This ID can not be updated.
Friendly Name: Name your phone number. This is a field that you can just leave blank if you want the name to remain just the number itself.
Campaign: Select one of the Campaigns you've created in your system that you want to be assigned to this number.
Call Plan: Select one of the Call Plans you've created in your system that you want to be assigned to this number.
Twilio SID: Reference ID to connection with Twilio for this phone number. This ID can not be updated.