The proper L3 switching between the BSC and the BTS is dependent on the proper operation of the L2 link, that is, the LAPD link.
Measurement of Discarded Paging Messages due to Overload per LAPD contains the measurement counters related to the number of times when the short message paging, CS paging, or PS paging is discarded on LAPD Link because of the system overload or the LAPD link is overloaded or unavailable.
LPAD link.
The following table lists the measurement counters related to the Measurement of Discarded Paging Messages due to Overload per LAPD.