Following the resampling discussion, I tried upgrading to revision 12018. which compiled cleanly, but then failed to load my internal SIP profile: [ERR] sofia.c:739 sofia_profile_thread_run() Error Creating SIP UA for profile: internal The same configuration works under revision 11488, to which I've temporarily downgraded. Either something has changed in FreeSWITCH that requires modifications to my SIP configuration, or this is a regression. I decided to try rev. 12027, which, on the same machine (Debian Sid) fails to build with the following error: x86_64-linux-gnu-gcc -c -ggdb -I. ./dftables.c In file included from ./dftables.c:50: ./pcre_internal.h:239:2: error: #error LINK_SIZE must be either 2, 3, or 4 make[2]: *** [dftables.o] Error 1 I suspect that recent changes to the build system are responsible for the latter. I'm sure these are minor matters that will be sorted out soon. Thanks once again to the developers for a great project!