switch_dtmf_t     585 mod_freetdm/mod_freetdm.c static switch_status_t channel_send_dtmf(switch_core_session_t *session, const switch_dtmf_t *dtmf)
switch_dtmf_t     700 mod_freetdm/mod_freetdm.c 		switch_dtmf_t _dtmf = { 0, SWITCH_DEFAULT_DTMF_DURATION };