| 摘要 |
1514453 Statistical metering TELEFONAKTIEBOLAGET L M ERICSSON 7 April 1977 [13 April 1976] 14976/77 Heading H4K Counters Cl n individually record the number of seizures of respective devices D n whereas counters C2 n record only the number of seizures lasting for longer than a predetermined time as determined by timers TM n . Individual dividers qn determine the ratio of the two counts for respective devices whereas adders #C1, #C2 and divider Q determine the overall ratio for a group of devices. The ratio for each device is periodically compared with the overall ratio and an alarm signal is produced for certain differences between the ratios. A blocking signal may also be supplied to a faulty device. The devices may be relays, relay sets, registers, code senders, code receivers, markers, regional processors, &c. |
