To introduce global Voice Country Guidelines, a new online resource has been created by Twilio to provide rules and best practices for placing Voice calls around the world. Navigating Voice calling in different countries is tricky due to varying definitions of acceptable traffic profiles, carrier requirements, and feature support. The guidelines cover three key categories: reachability, features supported (such as Caller Identification and Dual Tone Multitouch), and local carrier guidelines. Understanding these details is crucial for ensuring compliant traffic profiles and using Twilio's Super Network capabilities in each country. The resource aims to help developers and businesses make informed decisions when sending or receiving Voice calls globally.