2.38 Segmentation Message (SGM): A message sent in either direction to convey an additional segment of an overlength message. Table 49/Q.763 Message Type: Segmentation Parameter Reference (subclause) Type Length (octets) Message type 2.1 F 1 Access transport 3.3 O 3-? User-to-user information 3.61 O 3-131 Message compatibility information 3.33 O 3-? Generic digits (national use) (Note 1) 3.24 O 4-? Generic notification indicator (Note 1) 3.25 O 3 Generic number (Notes 1 and 2) 3.26 O 5-? End of optional parameters 3.20 O 1 NOTE 1 - This parameter may be repeated. NOTE 2 - Peer-to-peer interworking with an earlier version of ISUP may result in format errors and lead to the release of the call.