• Log in to Gamma's Portal
  https://www.gamma-portal.com/login.jspa

Click the dropdown arrow on the Provisioning & Service Management from the top tab:

Go to: Voice Connectivity >> Gamma SIP Trunks >>  Service Management

Next, Click Search to see the SIP Trunks we have setup with Gamma:

231289.     Outbound only

188240      Calls are being sent in a different format 

182518 -   Old main Trunk, this is where we order all of our current DID's

Next, click View on the last Trunk 

Hit the dropdown labeled Please Select an Action 
Click Add New Numbers and Continue  button

Select the desired Area code and quantity.
Please Note: Consecutive button can be used to order a range of numbers, if requested by the customer

Click Check availability and Save

Confirmation email will look like this: