2.33 Pass-Along Message (PAM): A message that may be sent in either direction to transfer information between two signalling points along the same signalling path as that used to establish a physical connection between those two points. Table 43/Q.763 Message Type: Pass-along (national use) Parameter Reference (subclause) Type Length (octets) Message type 2.1 F 1 Message type Mandatory fixed part Mandatory variable part Optional part Any message in Tables 21 to 50 which is relevant only at the "endpoint" of a connection as defined in clause 3/Q.764.