The device will be polled every remPollPeriod seconds. The first poll is sent as soon as the remPollStatus is set to valid(1). To prevent overlapping polls, the value of remPollPeriod must be greater than 2*remPollTimeout*remPollAttempts - otherwise an error is returned when the row is set to valid. A poll consists of sending up to remPollAttempts request packets to the device. A reply to any of the request packets is sufficient to declare the poll successful (and stop further requests from being sent). A poll is deemed unsuccessful if no replies have been received after remPollTimeout*remPollAttempts seconds from the start of the poll. Note: each request packet must contain some sequence information so that late replies do not result in a successful poll. The first unsuccessful poll causes a PollFailure event to be generated - further unsuccessful polls do not generate events. The next successful poll to the device causes a PollSuccess event to be generated - further successful polls do not generate events. The pattern then repeats. The value 0 has a special value meaning of only-once When remPollStatus is set to valid(1), a single poll is started immediately. There are no events generated. whether the poll has been judged successful or unsuccessful. The results of the poll(s) can be monitored by reading the remPollLastRequest and remPolLastReply fields. This object may not be modified if the associated remPollStatus object is equal to valid(1).