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This is a response to [1] and [2]. In short, since upstream commit "channel.c: Resolve issue with receiving SIP INFO packets for DTMF" a segmentation fault occurs during DTMF when no timing module is loaded. This commit adds the timerfd timing module to the asterisk base package. Other possibilities would have been res_timing_pthread and res_timing_dahdi, but timerfd is the obvious choice because it's efficient and OpenWrt offers the required kernel support (see [3] for more details). Note: even without any timing module the segmentation fault should not occur according to upstream. Upstream is still working on that. But in general it makes sense to have a timing module available (loaded) and the module is tiny anyway. [1] https://github.com/openwrt/telephony/issues/597 [2] https://issues.asterisk.org/jira/browse/ASTERISK-28800 [3] https://wiki.asterisk.org/wiki/display/AST/Timing+Interfaces Signed-off-by: Sebastian Kemper <sebastian_ml@gmx.net>