ie_bc
ie_call_id
ie_call_state
ie_called_sub
ie_calling
ie_calling_sub
ie_cause
ie_change_status
ie_channel_id
ie_cong_level
ie_connected
ie_connected_qsig
ie_date_time
ie_display
ie_end_to_end_delay
ie_endpoint_id
ie_escape
ie_facility
ie_feature_ack
ie_feature_ind
ie_hlc
ie_info_rate
ie_info_rq
ie_keypad
ie_llc
ie_min_thr_class
ie_more_data
ie_name
ie_notify_ind
ie_nsf
ie_orig_called
ie_pkt_bin_par
ie_pkt_size
ie_pkt_win_size
ie_progress_ind
ie_redirecting
ie_redirection
ie_repeat_ind
ie_rest_ind
ie_segmented
ie_sending_compl
ie_service_prof
ie_shift
ie_signal
ie_switchhook
ie_tdsi
ie_transit_sel
ie_uui
if multiple nai values are
if the event value field is not success
illegal
illustrated
imgtapi
imlpp_lfb_path_reserved
immediate
implicitly
implicitly identified
implied
implies
improved