standard window size
The default window size is the rule window size of the packet layer on the Datex-P port. It is set to the value 2 by default. Deviating from this, a different window size between 1 and 7 is defined on customer request - if necessary for each channel and both transmission directions separately. Regardless of the window size of the network layer, the window size of the data linklayer is fixed at 7.