A ladder you are allowed to draw

• A ladder is a drawing of messages between named boxes.
• Draw a message only if a page you opened names that job.
• SIP can create, modify, and terminate a session. Registration is a separate function in RFC 3261.
• Early media, transfer, and conference methods are not copied here unless the section was read.
• Vendor call-flow posters were not opened.

These are study notes, not vendor documentation and not legal advice. learning-only student project. https://cyphermonkeylabs.com/#contact https://github.com/CypherMonkeyLabs https://linktr.ee/cypherMonkey