To upgrade from Kamailio 4.1 to 4.2

1. If Enswitch is at version 3.12 or earlier, first upgrade to 3.13 or later.
2. If upgrading from a Kamailio version prior to 4.1.x then apply any database and configuration changes from the 4.0 upgrade first.
3. Install files:
   • mv /lib/kamailio /lib/kamailio-41
   • enswitch install -u kamailio
4. Recreate location table with new columns (all existing telephone registrations will be lost):
   • enswitch kamailio_tables # only needs done on one machine
5. Update configuration to 4.2:
   • vi /etc/kamailio/kamailio.cfg # and change kamailio_41 to kamailio_42.cfg
6. If using a custom kamailio_42.cfg then update the configuration by adding the following lines:
   • modparam( "usrloc", "expires_type", 1 )
7. Set System -> Configuration -> "Location expires format" to "integer".
8. Restart Kamailio:
   • enswitch restart
9. Check the Kamailio log for errors and test calls.