SWITCH_CAUSE_NORMAL_CLEARING 1750 mod_freetdm/mod_freetdm.c switch_call_cause_t cause = SWITCH_CAUSE_NORMAL_CLEARING; SWITCH_CAUSE_NORMAL_CLEARING 1851 mod_freetdm/mod_freetdm.c switch_channel_hangup(channel, SWITCH_CAUSE_NORMAL_CLEARING);