In communications technology, the term isarithmic is used for flow control. The isarithmic principle is a procedure in which only a limited number of data packets may travel in the network at the same time.
Before a data packet is sent out, the sending station must obtain a permit. The number of permits is limited. Once a data packet has reached the destination station, the permit is released again for another data packet. Transmission using the Isarithmic method therefore takes more time.