RADIUS Attribute - Acct-Output-Octets
As Per RFC 2866
This attribute indicates how many octets have been sent to the port in the course of delivering this service, and can only be present in Accounting-Request records where the Acct-Status-Type is set to Stop.
A summary of the Acct-Output-Octets attribute format is shown below. The fields are transmitted from left to right.
Type (IETF Number) = 43 for Acct-Output-Octets.
Length = 6
Value = The Value field is four octets.