The reachability data of the NTP server. The value is an eight bit number that represents the status of the last eight NTP transactions between the PSD and the NTP time server. Each bit indicates whether or not a single transaction was successful. A bit value of one indicates a successful transaction For example, a value of (175) (10101111B) indicates that two valid responses were not received during the last eight polls. However, the last four polls worked fine.