Description: Each entry contains the PPP interface number, the lower interface number, the order number of the link inside the lower interface, a description of the lower interface, the circuit identifier, a variable to check variables deletion (corresponding counters reset), and variables that give information about the following counters values: sent and received frames number, sent and received bytes number, number of sent and received Configure Request LCP frames, number of sent and received Configure Ack LCP frames, number of sent and received Configure Nak LCP frames, number of sent and received Configure Reject LCP frames, number of sent and received Terminate Request LCP frames, number of sent and received Terminate Ack LCP frames, number of sent and received Echo Request LCP frames, number of sent and received Echo Reply LCP frames.