3.29 Information request indicators (national use) The format of the information request indicators parameter field is shown in Figure 29. 8 7 6 5 4 3 2 1 1 H G F E D C B A 2 P O N M L K J I Figure 29/Q.763 - Information request indicators parameter field The following codes are used in the information request indicators parameter field: bit A Calling party address request indicator 0 calling party address not requested 1 calling party address requested bit B Holding indicator 0 holding not requested 1 holding requested bit C Spare bit D Calling party's category request indicator 0 calling party's category not requested 1 calling party's category requested bit E Charge information request indicator 0 charge information not requested 1 charge information requested bits G-F Spare bit H Malicious call identification request indicator (reserved, used in ISUP'88 Blue Book) 0 malicious call identification not requested 1 malicious call identification requested bits L-I Spare bits P-M Reserved