Hello,
MC926
Whenever a TCH cannot be allocated due to the TCH processing capacity of CCP reaches the limit defined by the MAX_TCH_PER_CCP parameter.
MC541a, MC551, MC555, MC651, MC612a/b/c/d will also increase in such situation, but they are counting many other things as well.
Altogether, the MC926 is the one counting specifically the CCP congestion, and you should monitor it carefully 🙂
Let me know if that helps.
Regards,
Pix