Overview

While looking through call outcomes you noticed not familiar status code and would like to know its meaning

Solution

You can find the full list of SIP response codes in Wikipedia.

Note: sometimes you will see status codes higher than 10000 - in such cases, you'd just need to take 10000 off our code. For example, NU (10606) translates into "606 Not Acceptable - The user's agent was contacted successfully, but some aspects of the session description, such as the requested media, bandwidth, or addressing style, were not acceptable."