Arrive at point A in 9±5 seconds and buffer with the accumulator. Further messages are transmitted to point B through the data transmission line, which consists of two parallel channels, one of which is the main one, and the other is the backup one.
The system operation starts again in normal mode. In normal mode, messages are transmitted over the main channel in 12±7 seconds, and the backup channel does not work. In the main channel, faults occur at intervals of 215±25 seconds. At the moment of failure, the main channel is turned on and after 2 seconds the backup channel is launched, which transmits notifications that are accumulated in 16±5 seconds.
If a notification was transmitted on the main channel during an outage, the transmission will not be interrupted, but will continue until the end.
Updating the main channel takes
83±9 seconds. After this update, the backup channel is switched on and the main channel is switched on at the same time, which continues its work. If, after switching on the backup channel, a notification was transmitted to someone else, then the transmission will not be interrupted, but will continue until the end.