The kamailio package appears to be failing on SPARC:

https://buildd.debian.org/status/logs.php?arch=sparc&pkg=kamailio

and this is preventing the package from propagating to the testing distribution.

https://release.debian.org/migration/testing.pl?package=kamailio

This means it is not eligible for inclusion in the next stable release of Debian.

This may not be hard to fix and it is also possible to just declare that SPARC is unsupported and exclude it from building there. As long as it builds fine on all the other platforms then it should propagate to testing/jessie