After confirming that all parameters from our end was correct, we checked for the leased media end. We asked for the KLM mapping table as per the picture above, and found out that sites on a particular KLM table was fluctuating. This was because some E1 in the KLM table was protected whereas others were not protected. The above picture shows the scenerio. For the lease media service provider, node 11 to 15 was unprotected whereas other nodes were protected. Now, when their link fluctuated, our sites that were running on that particular KLM was getting down.