Alcatel-Lucent 7450 System Management Manual page 33

Security
If TACACS+ accounting is required, then, depending on the accounting record type specified,
sends a start packet to the TACACS+ accounting server which contains information about the
event.
The TACACS+ accounting server acknowledges the start packet and records information
about the event. When the event ends, the device sends a stop packet. The stop packet is
acknowledged by the TACACS+ accounting server.
7450 ESS System Mangement Guide Page 33