Register.com - Modifying DNS SRV records

To edit your SRV record in Register.com log into Register.com and click on the your domain to edit. Scroll down to "Advanced Technical Solutions" and click on "Edit SRV Record".

Edit the SRV record with the following settings and hit "Continue" and then confirm the settings with the second "Continue"

Service: SIP
Proto: UDP
Name: (your domain name goes here)
Priority: Low
Weight: 0
Port: 5060
Target: sip.onsip.com