I wanted to screenshot these settings and share them for the next time I have to do this. Ofcourse, it was super easy to register after I got rid of the special characters in the password.
Here you will see that it is a standard gateway. The username and password are created in BulkVS under Interconnection -> Trunk Group Manage. The FROM USER field is the same as the username. Proxy will be sip.bulkvs.com:5060. Lastly, I might have it wrong but the retry seconds should be dropped to under 30. Step 2 on the Bulkvs website says this:
Step 2: Configure your system with the BulkVS SIP Registration credentials from step 1. Your system should register with the BulkVS SBCs every 25 seconds or less
