Cisco 7960G with Twilio

I spent quite some time trying to figure out how to configure a Cisco 7960G to work on SIP with Twilio. Here are the steps I took to get this working. My setup contains only one SIP phone on my home network. For more complicated setups, you may be able to use some of this information, but I do not know what modifications you will need to make.

Incoming Code:

AAAAAAAAAA is the ten-digit phone number that is receiving the incoming call.
BBB.BBB.BBB.BBB is the IP address of the SIP phone. For whatever reason, you CANNOT use anything but the actual IP here.

Outgoing Code:

CCCCCCCCCC is the ten-digit phone number that you want to appear on the Caller ID for the recipient. This number MUST be a number that you manage through Twilio, or a number that is verified with Twilio.

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