RING detect from German analog phone line

Issue:
Using the MT5692SMI (.R1) product with 1.01L code. Issue noticed in certain conditions/circumstances where the RING is no longer being detected, whereas it was previously being detected with the 1.01J version of code.
Issue initially noticed on standard German analog phone lines but could apply to numerous variances of line conditions.

Resolution:
Flash modem with 1.01K code.