CSupportTimetableCache::GetNumberOfDaysBackward

static function GetNumberOfDaysBackward()
{
	$supportCacheDaysForward = intval(COption::GetOptionString("support", "SUPPORT_CACHE_DAYS_FORWARD", 0));
	$slaDays = ceil(self::GetMaxSlaResponseTime() / 1440 * 5 + 20);
	return max($supportCacheDaysForward, $slaDays);
}