> PA3YBR has already run DD over the 4800 signal on D-STAR. To tell D-STAR > you are using DD format (Ethernet Frames) rather than DV (Voice) format > is only 1 flag bit in the header. Fred says this does not harm DV > communications on the same frequency (though you can only have 1 signal > at a time). The problem is the RP2C repeater controller has > expectations on whether an attached module is DV or DD and likely Icom > G2 software has the issue as well. > > With the advancement of alternative repeater/controller/gateway chains > using node adapters <http://enicomms.com/>, this mode is well within > reach (though out of spec). Build up a G4ULF repeater > <http://g4ulf.blogspot.com/2010/02/release-plans.html> or DVAR Hot Spot > <http://w9arp.com/hotspot/> (I have done this - it was relatively simple > http://k7ve.org/blog/2010/06/nw7dr-the-d-star-repeater/), work with > G4ULF and KB9KHM to support both repeating of these data streams and to > break them out to the /dev/tap /et voilà/! Then for user radios, until > there is an integrated solution from a manufacturer, one would just need > to use node adapters with an appropriate driver that looks like an > Ethernet device (very slowly).
If G4ULF and KB9HKM supported this mode; if AA4RC modified his reflectors to create a "data mode" reflector; and if the node-adapter folks would add such a data mode (serial in/out at 4800 bps), you could do this with non-DStar radios over much of the existing network infrastructure. AMBE is not needed for this mode. Interesting to speculate. 73!
