> AX25 allows several stations to operate within a bit of spectrum wide enough > for one. For example, up to a dozen Q15x25 stations can operate within one > 1k to 3k ( depending on how you scale the modems ) slice of spectrum. > > ARQ modes that do not operate under AX25 are incapable of this, and so are > far less spectrally efficient,
If spectral efficient means bytes per spectrum (kilohertz maybe) per time - then it's far more efficient to time multiplex where stations take turns passing traffic rather then trying to simultaneously use the spectrum. That's the same reason we all have home run 100 base T networks and switches on our personal networks instead of hubs or coax... The overhead and problems of sharing a channel are throughput killers.. > 73 DE Charles, N5PVL More later... Bill - WA7NWP
