The lot is build on a eurosized board with 0.3 mm Cu wire. Note that the ESCC permits to work full-duplex. So pinging the node is possible.
All software is written in assembly language, and optimized for speed.
It appeares however that the 68008 is not powerfull enough to run 38k4 and 76k8 on the two available ports, so in the near future the node will be upgraded to a 680X0 microprocessor. This link will work on 13cm at 76800 baud.