An entry in the cpIwfCadencedRingingTypeTable that represents a single ringing cycle. This entry contains a list of integers that represent consecutive ON/OFF periods (in milliseconds). The integer cadencedRingingNumPeriods indicates how many cadencedRingingOnPeriod/cadencedRingingOffPeriod pairs in this row have a meaning. The maximum value of cadencedRingingNumPeriods is 10. There are two special ringing cadences: no ringing and continous ringing. The former is indicated by setting cadencedRingingNumPeriods == 1 and cadencedRingingOnPeriod1 == 0. The latter is indicated by setting cadencedRingingNumPeriods == 1 and cadencedRingingOffPeriod1 == 0. Otherwise a valid cadencedRingingOnPeriod or cadencedRingingOffPeriod must always be greater than zero.