RADIUS Attribute - Acct-Output-Packets
As per RFC 2866
This attribute indicates how many packets have been sent to the port in the course of delivering this service to a Framed User, and can only be present in Accounting-Request records where the Acct-Status-Type is set to Stop.
A summary of the Acct-Output-Packets attribute format is shown below. The fields are transmitted from left to right.
Type (IETF Number) = 48 for Acct-Output-Packets.
Length = 6
Value = The Value field is four octets.