enable_dtmf_function 4027 mod_freetdm/mod_freetdm.c SWITCH_STANDARD_APP(enable_dtmf_function) enable_dtmf_function 4127 mod_freetdm/mod_freetdm.c SWITCH_ADD_APP(app_interface, "enable_dtmf", "Enable DTMF Detection", "Enable DTMF Detection", enable_dtmf_function, "", SAF_NONE);