3.33 Message compatibility information The format of the message compatibility information parameter field is shown in Figure 33. 8 7 6 5 4 3 2 1 Instruction indicator Figure 33/Q.763 - Message compatibility information parameter field The following codes are used in the subfields of the message compatibility information parameter field: a) Instruction indicators The format of the instruction indicators subfield is shown Figure 34. 8 7 6 5 4 3 2 1 1 ext.1 G F E D C B A 1a ext.1 More instruction indicators if required . . 1n 1 More instruction indicators if required Figure 34/Q.763 - Instruction indicators subfield The following codes are used in the instructions indicators subfield: bit A Transit at intermediate exchange indicator 0 transit interpretation 1 end node interpretation bit B Release call indicator 0 do not release call 1 release call bit C Send notification indicator 0 do not send notification 1 send notification bit D Discard message indicator 0 do not discard message (pass on) 1 discard message bit E Pass on not possible indicator 0 release call 1 discard information bits G F Broadband/narrowband interworking indicator 0 0 pass on 0 1 discard message 1 0 release call 1 1 reserved, assume 00 b) Extension indicator 0 information continues through the next octet 1 last octet c) More instruction indicators The bits will be defined when required.