> Hi, > > For fun I'm developing a router for HAM packet networks. What it does is > route AX.25 packets between radios and tunnels (it can also bridge- and > filter them). Hi Folkert, isn't such a router a perfect place to add a long-missing time distribution feature for ax.25 (or fx.25), like adding a a ultraQoSly UI timestamp frame which is not suffering from those pesky persistence and timer games and predicting its own timestamp for the moment its last bit drops out of the rx-side modem at known datarate? Regarding your measurement, at least you should be able to find out some of your propagation times from timestamped logs of course to figure out I to RR frame delays etc. vy 73, Hendrik