2.27	Information Request message (INR): A message sent by an exchange to request information in association with a call.
Table 31/Q.763
Message Type:  Information request (national use)

Parameter
Reference (subclause)
Type
Length (octets)
Message type
        2.1
F
1
Information request indicators
        3.29
F
2
Call reference
        3.8
O
7
Network specific facility
        3.36
O
4-?
Parameter compatibility information
        3.41
O
4-?
End of optional parameters
        3.20
O
1