Being able to customize the APDU size helps with a router that has a lower APDU size in between two nodes that claim a full-size APDU (for example 1476). Without the ability to reject messages that are too large, the intermediate router silently drops the oversized RPM messages. Adding an ApduSizeOverride to a device ignores the device-provided value and allows the system to work around hourglass networks.

Figure 85.   ApduSizeOverride property