The TCONNECT protocol is part of the OSI transport layer, where TCONNECT confirm is the API called when the remote transport user (TU) responds to a connection request from the local TU.
TCONNECT confirm: This is the final step in establishing a transport connection, where the remote TU confirms the connection request from the local TU.
Sequence: The sequence typically involves TCONNECT request, TCONNECT indication, TCONNECT response, and finally TCONNECT confirm.
Reference:
OSI Transport Protocols: OSI Transport Layer