About the Repeating Function
Mechanism of digital trunk exchange

he repeating function amplifies, reshapes, and regenerates signals degraded during transmission.
For analog signals, the repeating function amplifies the level of degraded signals and reshapes their waveform to return the signals to the transmission line at the same signal level with the same waveform as when they were input.
For digital signals, the repeating function checks for presence or absence of degraded pulse signals and regenerates the same pulse signals as the transmitted ones to return them to the transmission line.