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Upgrade Kamailio 3.2 to 4.0 through 3.3 – debian squeeze

Till now there is no available manual how to upgrade directly form older versions of Kamailio to actual version of 4.0. Therefore we will upgrade with a middle step, first we upgrade from 3.2 to 3.3, and then from 3.3 to 3.4. Migration from 3.2 to Kamailio 3.3 and then to 4.0 requires upgrade of installed packages, database structures and configuration file.

Upgrade of Packages

First, we have to add correct debian repository of kamailio version 3.3. So open your apt source list file