This object defines up to 8 tariff period boundaries, each octet representing the quarter-hour since midnight at which a new billing rate period begins, and the description notes each successive value must be at least 4 units (one hour) larger than the last or it's silently ignored. An admin implementing time-of-day billing rates, for example cheaper off-peak calling, configures this to mark when each new rate period kicks in, and needs to respect the minimum spacing rule or a misconfigured entry will be silently dropped rather than erroring out. An admin defining a peak period starting at 8:00am and an off-peak period starting at 6:00pm would encode octet values of 32 and 72 respectively in this object.