How SIP hold using RFC6336 is implemented and how it looks in production.
Categories
Tag: RFC3261
Categories
SIP Supported & Require
Function of Supported & Require headers in SIP.
The rules for which headers to use when creating a SIP request and knowing where to route it.
Categories
What is a SIP Registrar?
Explanation of what a SIP Registrar does, Contact header and Address on Record, and how it all fits together to route messages correctly.
Categories
SIP Concepts – Record Routing
Explanation of Record-Routing, why it exists and how it’s used.
Categories
Why z9hG4bK?
Why does every SIP branch start with z9hG4bK?
Categories
Reverse MD5 on SIP Auth
How the SIP Authentication mechanism works, and how we can reverse it to check the password we’re expecting is the encrypted value we’re seeing in captures.