FTDM_CAUSE_CHANNEL_UNACCEPTABLE 799 src/ftmod/ftmod_isdn/ftmod_isdn.c fail_cause = FTDM_CAUSE_CHANNEL_UNACCEPTABLE; FTDM_CAUSE_CHANNEL_UNACCEPTABLE 815 src/ftmod/ftmod_isdn/ftmod_isdn.c fail_cause = FTDM_CAUSE_CHANNEL_UNACCEPTABLE;